I thought I'd cover Avengers Campus at the Disney Parks. Stated to be an alternate timeline where the blip never happened but doesn't have much in terms of continuity as it's intended to be the present despite the MCU being chronologically a few years forward. I'll try to work toward explaining this.
It's been stated to be a timeline where the Blip never happened but the POD appears to be before that for some things to make sense.
Black Widow(2016)- Taskmaster is still a villain.This is the earliest possible POD. In the film, Taskmaster is freed when Natasha obtains two antidote vials, giving one to Yulena to free the other Widows. ITTL one vial broke during the destruction of the facility. Taskmaster fought Natasha but Yulena, Alexei and Melina, i.e. Natasha's family, jumped in to help and Taskmaster fled. Since that point Natasha, similar to Steve's hunt for Bucky, has been searching for Taskmaster to free her.
Black Panther, Spider-Man: Homecoming, and Doctor Strange seem to have happened the same.
Thor: Ragnarok(2017)-Thor still has Mjolnir but Stormbreaker(if you count its appearance in Guardians of the Galaxy: Mission Breakout) still exists and Jane Foster as Mighty Thor appears later though they avoid showing Thor with Mjolnir when that character appears to not make it obvious. A small change likely took place. when Odin died and Hela appeared, Thor did not throw his hammer but called lightning, which did very little. Thor and Loki then took off and were stranded on Sakaar. With Mjolnir Thor has no real need to find his inner strength and is likely never caught, fighting his way to the arena and Hulk before escaping. the Avengers Quinjet ar eunlikely to carry them into space as they work on propulsion and Hulk arrives via a wormhole so they steal one of grandmaster's ships. Valkyrie attempts to stop them but is likely won over to help them escape and Korg incites a revolution. A battle ensues as Thor's group arrives to fight Hela. What changes is Thor realizes the prophecy sooner and Loki is with them so he sneaks around as the battle commences and summons Surtur Sooner, leading to an earlier victory but also the destruction of Asgard as they retreat.
Avengers: Infinity War(2018)-Here is where changes begin to occur. First of all if I'm not mistaken there is no Valkyrie, Korg or Miek in Avengers: Campus. It's possible Thanos attacked and destroyed their ship. They likely sent out a distress signal before this happened and then Thanos and the Black Guard attacked the ship Thor and Loki were on. Heimdall was killed but Thor had Mjolnir and Thor, Loki and Hulk were sent to Earth. Here they met Dr.Strange and Wong who contacted Tony. Thor and Hulk surprised to learn about the Sokovia Accords. Loki is not happy to see Strange and Tony not happy to see Loki but is amused to hear about what Strange did to him. There's a brief discussion on Ice cream flavors named after Avengers with Hulk and Thor learning Baskin Robbins made flavors of ice cream named after them called Hulka-Hulka Burning Fudge and Strawberry Thorbet. Thanos's Black Order of Ebony Maw and Cull Obsidian arrive with Spider-Man showing up to help. This time though with Thor in the fight the two are defeated and killed. Thor mentions needing to go form Stormbreaker and heads to the forge with Hulk., who takes Thor's place in the forge and nearly dies. The result is the creation of a similar in appearance Stormbreaker with a wooden handle but not a piece of Groot,
Meanwhile Corvus Glave and Proxima Midnight attacked Scarlet Witch and Vision with other Avengers jumping in to help. Vision is taken to Wakanda where Thanos arrives with the army and only the Power Stone. As without Loki dying and the Tesseract being obtained(he is alive in Avengers C.A.M.P.U.S.) Thanos cannot teleport. A battle ensues that ends in Vision's death but Thor arriving just in time to stab Thanos in the chest and finish him off while he lacks the Stones. Vision is dead(he doe snot appear in Avengers C.A.M.P.U.S.). The Guardians of the Galaxy meanwhile do not head to Earth and Gamora(another character alive in C.A.M.P.U.S.) does not die. They eventually do head to Earth and formally meet the Avengers,
An immediate result of this is the Pyms and Lang not disappearing, meaning they cure Ghost.
The Avengers in the aftermath of stopping Thanos form the C.A.M.P.U.S. with bases in Los Angeles and Paris with others to be founded to train new recruits including the W.E.B. program led by Peter Parker to train young heroes. This includes Harley Keener(kid from Iron Man 3), Cassie Lang, Miles Morales(maybe also bitten?), Gwen Stacy(maybe or maybe not with powers, I'd imagine there tech based here), Doreen Green(Squirrel Girl, I imagine she has some kind of Ant-man tech but for Squirrels).Riri Williams(possibly trained by Tony Stark with Keener), Rick Jones, Amadeus Cho(both likely Banner Protogees), Lunella Lafeyette(Moon Girl), Anya Corazon(Arana/Spider-Girl), Onome, Dante Pertuz(inferno), Shaun Lucas(Patriot), and Takeshi Matsuya(Wiz Kid).
Toyn Stark designs the LXXX(80) Armor(He uses it in the Parks so that Disney can have a suit combining all the iconic elements. The Armor in Infinity War was MKL(50) and Endgame was Mk LXXXV(85)). He also still built the rescue Armor.
Loki is free to roam the Avengers: Campus, presumably having been forgiven or possibly pardoned for his role in the Chitauri Invasion. It's possible most would assume his variants like TVA Loki and President Loki are him in a different outfit.
The Collector is also alive without Thanos killing him and he will grow more ambitious as a villain with him gone(similar to Episode 2 of What if?) which leads him to abduct the Guardians of the Galaxy in Guardians of the Galaxy: Mission Breakout and the events of its sequel, Monsters After Dark. The Collector's experiments on Groot turned him back into a baby, though upon being freed he grew at a faster than normal rate back into adulthood(Baby in Breakout, adult in Cosmic Rewind).
Now onto how individual shows and films would be changed by no Blip.
Wandavision- Likely does not happen as the Avengers being around means including Stark means they can obtain Vision's body. Agatha Harkness actually appeared as a character during Halloween. In my theory, because there was no Westview, Agatha simply approached Wanda and offered to teacher her. As a result Agatha walks around Avengers C.A.M.P.U.S. freely subconsciously influencing Wanda, who is now dressing as and calling herself the Scarlet Witch without the actions she undertook in Multiverse of Madness.
The Falcon and the Winter Soldier-Steve Rogers is still young but has passed the mantle to Sam willingly as he appears in that role in the Parks. He is still there to train Sam and help Bucky. No Flagsmashers exist due to no Blip. Sharon Carter does not become the Power Broker and Zemo is still imprisoned also because of this. Also with Steve and Sam around John Walker does not become Captain America.
Shang Chi-Originally in 2024 but needs to be moved down due to Shang-Chi's early appearance. For this to happen i'm going to propose that Tony, with Thanos dead, is now more active as a hero even with a young daughter at home. He stumbles on proof the Ten Rings still exists. This results in an interesting case of Iron Man in Shang Chi. Tony knows that the Ten Rings want to capture Chang when a video of him fighting goes viral and he arrives in Iron Man armor and questions them. To learn more he recruit Shang Chi and his friend Katy to infiltrate and then helps them escape, sharing an awkward reunion with Trevor Slattery. He goes with the group to Ta Lo and does much to help defend it thanks to his advance technology, including flying around to attack both Wenwu. The Dweller in the Darkness is partly released, something barely done thanks to Tony helps Shang-Chi. Wenwu is killed and passed the ten Rings to Shang-Chi, who then helps Iron Man defeat the Dweller. Death Dealer is still alive and is presumably now running the Ten Rings after refusing to bow down to WenWu's children, leading to fights with Shang-Chi.
Eternals-The Events of this film are triggered earlier as without the Blip, the population reaches the necessary amount to facilitate the Celestial awakening. Ajak tells Ikaris she plans to tell the Avengers of the Celestial and is killed with the Deviants escaping. The remaining eternals convene and reluctantly go to the Avengers fo help, revealing their existence. As a result they have an easier time defeating Sprite and Ikaris as well as killing the Celestial, even destroying most of its body. For this specific mission due to the cosmic danger level, Fury called in Captain Marvel. In the aftermath Captain Marvel and the Eternals Sersi, Kingo and Phastos are celebrities as their involvement is public knowledge. Sersi was the main one responsible and the most positive about humanity, Kingo now enjoy even greater success as a Superhero with the whole event recorded as well as the reveal he is actually several generations of famous actors and producers and Phastos now has many job offers. The rest of the Eternals leave and notably a Celestial does not show up(Sersi, Kingo and Phastos were the only Eternal characters to appear in the Parks),
Far from Home and No Way Home-With Tony alive, Beck goes after him directly and is likely defeated. As a result he does not reveal Peter Parker's identity(assuming it is secret as he seems to not try to hide it to a whole audience it in his ride at the park)and those events don't happen. I wish we'd have the No Way Home villains like Doc Ock walking around though this is not impossible. For Halloween they opened a portal and Zombie Cap stepped out, maybe something similar could happen but lead to the Raimiverse.
Multiverse of Madness-Does not happen due to a saner Wanda. America Chavez is a member of W.E.B. this is strange by the MCU's own logic there is only one Chavez but its likely this is the America Chavez and she just visits other universes from time to time, presumably this one for training. Something similar is likely happening with TVA Loki while President Loki somehow survived and escaped his apparent death, possibly using magic to make his lost hand appear still there. Chavez must have joined after Multiverse of Madness since she'd never heard of Spider-Man and is now working alongside him.
Hawkeye-Kate Bishop does appear but the rest of the series would not happen due to the Ronin costume never existing and Yelena having no reason to hunt Clint with Natasha still alive. I'd say Bishop was part of W.E.B. Clint thought she had potential and began training her as his apprentice.
Moon Knight-Seems to have happened a few years earlier, likely due to the antagonist moving up his plans. This also means Moon Knight did not escape the eye of the Avengers, presumably due to that Kaiju god battle in Egypt. He must be one of the most awkward people for the heroes to have a conversation with.
She-Hulk-Does exist but isn't physically. A bench with an ad for the character's law practice is present. Since they do't want to be a superhero this makes meta sense. Hulk is present but from what I can tell he's always in his time travel suit. My guess is with no rush he's experimenting with it but doe snot have as much progress.
Ms.Marvel-This is another case of it happened earlier, though Kamala's powers are possibly activated another way since she already had them. They were just activated. Part of the reason why Captain Marvel helped defeat the Celestial as they never would have been famous if Thanos was defeated before she arrived since in universe her popularity was due to her holding her own against him. Bruno Carrelli is a member of W.E.B.
Thor: Love and Thunder- Its possible Gor hasn't attacked yet as he would in 2025. I'd say this makes the most sense and Jane isn't diagnosed with cancer yet, Thor instead occasionally lends her Mjolnir after a time when she lifted it(maybe in battle with the Celestial in what I assume was a moment similar to Cap lifting Mjolnir but as a bait and switch where its revealed to be Jane). I can't imagine Thor lending the hammer is she has cancer, unless it progresses to the extent that Jane remains empowered for ever to stave it off. Another possibility is Gor is killed and his sword shattered with Thor wishing Jane's cancer away, though if he did that it would likely be all the world's cancer which seems a bit too Utopic. On the plus side Korg is dead meaning they don't take the Goats with them as he's not there to communicate with them.