Developing a keyboard App

Hi guys, is there a possible method or platform to code a precise and intensive input virtual tool (as sorts of keyboard app) on vision pro? (A little bit confused to choose Xcode or Unity cause the App may require plenty of 3D interactions, which as far as I'm concerned might be complicated to bring such here on Xcode trough either Volumes or Spaces.

Developing a keyboard App
 
 
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