So far at least Ubisoft, CAPCOM, Remedy, Kojima Productions and Hello Games.
That should tell us something about the appetite to support visionOS.
Additionally many developers are not porting their games to visionOS as protest to existing store percentages, nothing to do with Metal support.
It's Vision Pro 1. Maybe let's see how the next revision goes first.
That should tell us something about the appetite to support visionOS.