VisionOS doesn't dominate anything.

There is nothing going on here but embracing. When Microsoft did it, they forked a project and added their own features to their private fork, intending to replace the original. Apple is directly contributing code to the source project here.

Even if Apple was somehow harming and attempting to subsume Godot in this situation, what would the end game be? What would managing a game engine descended from Godot do for them?