I wouldn't call it pretty well, not quite yet. The Monado driver has come a long way, but doing anything useful with it still has too much legwork involved for the majority of WMR users, not including the switch to Linux. Although since the announcement, work on WMR-specific stuff seems to have sped up, so hopefully the situation improves.
I also recall seeing a working demo of hand tracking for WMR (maybe just the G2?), so that's neat.
This shouldn't be possible on Android. Google requires apps capturing http/s deeplinks verify ownership of the URI.[1] They can accept any other schema declared in their manifest otherwise. Example code would seem most plausible, but I can't see how it would work.
I also recall seeing a working demo of hand tracking for WMR (maybe just the G2?), so that's neat.
https://monado.freedesktop.org/ Monado OpenXR platform https://stardustxr.org/ Stardust XR display server