But there are PODs that could result in an Austrian victory. There was a TL before though I can't remember the name right now but the POD was the Battle of Mollwitz where the Austrians win. It was touch and go for the Prussians and they could've easily lost changing the outcome of the entire war.
Another idea I was considering for my TL was to kill off Charles Alexander of Lorraine. He did more harm than good to the Austrians. His death could've happened in the Austro-Turkish War during the 1730s where Charles was once badly wounded. Apart from removing his incompetence from command also Maria Anna of Austria would have to find another husband thereby securing another marriage alliance for the Habsburgs. If Neipperg is still in command in Silesia and loses like OTL Khevenhuller is placed in command of the army in Bohemia and could win at an analogous Chotusitz where the Austrians had a chance to catch the Prussian army divided in half and defeat them both in detail. Saxons retreat like OTL and Khevenhuller turns to Prague and stops Belle Isle from escaping Prague. Someone else who is capable takes command of Khevenhuller's Bavarian winter campaign (Barnklau, Daun, Browne) while Traun takes care of the Spaniards in Italy like OTL. In 1743 Traun comes to Bohemia to replace Khevenhuller and launches an invasion of Silesia where the Prussians are in a worse position, having to send some detachments to secure their border with Hanover and also in East Prussia while the Austrian hussars and other Hungarian and Croat light troops harass them and cut their supply lines and communications with help of some of the locals. Besides, Frederick is also running out of money pretty quick. I believe, based on how Traun chased Frederick out of Bohemia and Moravia in 1744 he could also defeat Frederick in Silesia. Brandenburg would probably stay safe but I'm pretty convinced the Prussians would be ejected from Silesia and forced to a peace treaty mediated by the English who had little concern for the Austrian reconquest of Silesia and would want a quick end to it and the restoration of balance of power. For them more important would be a joint campaign of some British and Hanoverian troops with a smaller Austrian army to crush the Bavarian and throw their French auxiliaries across the Rhine, securing a connection with Flanders and preventing a possible French invasion. The OTL Battle of Dettingen could be butterflied away (no huge Pragmatic threatening the army of Duc de Noailles but a small force is needed for Bavaria and takes a different route with Hanover threatened less now that Prussia is heavily defeated) that would further help prevent the French direct involvement. They are out of allies: Prussia is defeated, Bavaria overrun, Saxony left and Sardinia joined Austria as OTL. In the peace treaty Bavaria is restored, Prussia could lose some smaller territories like the Prussian Guelders or smt, Francis Stephen is to be elected Emperor. As for Italy without French involvement Spain has to back down. Only thing they managed to take was the Duchy of Savoy that could be a consolation for Infante Felipe with Sardinia compensated by territory from Milan as promised in Austro-Sardinian alliance. Now, if Louis XV is even a little reasonable he would not join the war. The only ally he's got is Spain. Sweden is defeated, Germany and Italy are lost, Russia won't provide any help. Still, even in such a situation he could make gains in Flanders, though if Austria is not busy with Prussia it would be less. In Italy if anyone else is in command instead of Botta d'Adorno who could stay as an ambassador in Moscow or even better do something unimportant, Austria can win there too. The British will take the French colonies and when everyone is out of money the war is over. In a treaty the French would give back their gains in the continent to get back the colonies in Canada and the Caribbean and the war is finished. However this depend on the writer if France will fight or wait for a better opportunity a decade or two later.
There, they win in Germany, Italy and the Caribbean but Savoy is bound to be lost since it's pretty easy to conquer from France than to reconquer from Italy but the Allies in Flanders are destined to lose unless you have commanders like Eugene and Marlborough cooperating. Traun wasn't too far and some coordination could've been achieved so a part of the Flanders could be saved preventing France from taking it for good, at least in this war. The only thing is that I can't think of a POD that helps Austria retake Lorraine. They couldn't have taken it themselves and I don't think the British or Dutch would've helped them much in that effort. It was one attempt when they couldn't have done nothing else and it fell apart quickly.