If Apple buys it, it'll quickly head down the path of exclusivity. They'll find some "security" excuse for it that'll be enough for their reality distortion field to do its thing.
Is there such a thing as an Apple exclusive game? I can't imagine a developer would want to cut off like 90% of the market from being able to play their title.
(I think there are a few on Apple Arcade, but I always assumed those were sponsored exclusives?)
There used to be some indie Mac (and later iOS) only game studios like Pangea Software (makers of Nanosaur, Bugdom, Otto-Matic, and Enigmo among others) but I'm not sure how many of those are still around.
As far as bigger studios go, Bungie was a Mac studio until Microsoft scooped them up to turn Halo Xbox-exclusive instead.
How could that work? Even the M2 Ultra isn't nearly as powerful an actual desktop GPU, much less workstation or data center cards. And devs will need to be able to test on Windows machines.