I did manage to get ALVR working. Can’t tell you what’s all needed. But sometimes you just have to find the right version. And SteamVR needs access to some devices. it should ask for root permissions on first run.
Other things to play around with are the video codecs. Or using the flatpak version or a normal system install of Steam.
I don’t have my PC at the moment, so I couldn’t give you specifics. But it definitely worked with my Quest 1.