There's even a sample app close enough
https://developer.apple.com/documentation/visionOS/placing-e...
Made me chuckle. I think at one point in my life I actually knew which exact GL versions and features were working on which servers. Also it's pretty cool.
Still won't buy an AVP.
It's lower resolution, but I think it would probably be sufficient for light work, and I'm not really interested in the pass-through camera features of the AVP. The real differentiator though was that the steam frame will also work with my existing computer for gaming, and I think it's likely to be much more hackable than the Apple Vision.
You won’t be able to use non-US credit card for the app store but you can always buy US virtual apple gift cards on amazon straight from apple shop there.
Does anyone else besides me suspect X11 will outlive visionOS?