Honestly, I haven’t seen many TLs about, say, Chinese states, the caliphates, or North Africa, let alone the indosphere. A few points of interest for me:
5 dynasties and 10 kingdoms
Different Song (different Wang Anshi, different Neo-Confucianism) (such as Zhugeliang’s TL)
No Jin
No Mongols
No sack of Baghdad/devastation of Persia
No/different Oghuz/Seljuks
Sassanids destroy the Eastern Romans. What now?
Different early Caliphate (such as Goulashcomrade’s TL)
Umayyads don’t fall or fall differently
Less Turkic or slave soldiers in Muslim world
Successful Tulunids
Establishment of a steady Muslim state in Persia (better Samanids/Buyids?)
Muslim dominance of the Mediterranean (Sicily, Crete, Cyprus, baleares)
No/different Almoravids/Almohads
Different Wagadou/post Wagadou state(s)
No/different Qarmatians or Banu Hilal or other disruptive unrulies
No anarchy of Samarra
No/different Fatimids
Successful Eastern Jin/Liu Song conquest of the 16 Kingdoms/Tuoba Wei
Permanent Xianbei-Han divide
Surviving Sui
Even better Tang: could they have conquered Nanzhao, Silla, or Central Asia? Effects?
Different Korea: No Koryo; what does it mean for the development of Korea and its interaction with neighbors? What will it be named? Will it ever unite into one state?
Different Tibetan Empire
No Japanese conquest of Emishi
No shogunate/different genpei war/different northern and southern courts schism
No Majapahit
Longer lasting Majapahit
More powerful Khmer (not destroyed by ecological disasters/religious schisms/Tai invasions)
Tang falls to Da Yan (An Lushan). What now?
Avert Huang Chao rebellion. What now?
Empire of Harsha?
Different tripartite struggle (avoid devastation of Ghaznavid/Ghorid and weakness of the Pratihara, Pala, and Rashtrakuta) (Shahrsayr did a short TL leading up to this)
Lasting Chola
No Timur
Surviving Naiman/Western Liao
Surviving Golden Horde
Different Mongol division of the Ulus
No Ottomans
Now for more general trends:
Gunpowder development (purifying, wet grinding, corning, plus all the different weapons that will be developed)
Religion (touchy subject, but different Manichaeism/Buddhism is a treasure trove for possibilities and has never been done in depth to my knowledge, just one example). How does this affect daily lives?
Earlier society-driven or state-sponsored scientific and technological developments. How could this be achieved and what are its effects?
Better medical practices/treatment. Vaccines, anesthetic, basic hygiene, etc. effects?
Ideologies (very similar and arguably indistinguishable from religions. Take humanism. Let’s say Petrarch died as a child from smallpox. How does this affect humanism? What if Zhu Xi never formulated his version of Confucianism (which was far more humanist than its predecessor)? How does this affect humanism? Are all still completely equal, or are there fundamental differences between groups of people? What is humanism’s relationship with Christianity or Islam? How does it view emotion, freedom, meaning, love, romance, and change?
That’s all I’ve got for now.