Your suspicion is that they're going to discontinue Bedrock and replace the iOS and Android versions with Java? Even though iOS doesn't even allow Java with JIT?
It's possible they could AOT compile for iOS, but I think the idea they are unifying to be unlikely.
Dunno. Apple makes exceptions for big companies and might do so for something as big as Minecraft. Also, SDL3 supports far more platforms https://wiki.libsdl.org/SDL3/README-platforms Now they can release a Java edition even for PlayStation and Xbox. At least porting to SDL3 opens the door to consoles and mobiles if they want to do so.