Don't get me wrong I'm super grateful to all the people who developed the linux 3D and VR software stacks to the point where this could even plausibly work! And I'm definitely playing in hard mode by trying to stream from a linux OS, and streaming a game that has no linux builds and so somehow has to persuade an entire pretend-to-be-windows stack to do VR properly.
It's so close, I feel like if I could just get the stderr from both the PC and headset sides of this I could figure out what's up, and it's going to be something stupid like some 32-bit library isn't installed and it poops the bed in non-obvious ways or something