VR Support for Linux is still in it's infancy. I think If I'd set up a Windows partition on my steam deck, this would work much better, but it still works.

Using ALVR, side-loaded onto my Quest, and installed on the Steam Deck in Desktop mode (https://github.com/alvr-org/ALVR/wiki/Installation), it pretty seamlessly connects and renders a VR environment.

I'd like to try SumulaVR (https://github.com/SimulaVR/Simula) or XrDesktop (https://uploadvr.com/xrdesktop-collabora-linux-vr/), but I haven't had the opportunity yet.