From the review section:

Nikos Q: Linux Desktop support? A: Hi,

Linux is not officially supported but can absolutely work with the Beyond 2. I'd suggest joining the Bigscreen Beyond Discord server for more information

Thanks By Bigscreen Support Team

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Rant: they have disabled selected text for the reviews for some inexplicable reason.

Lol, doesn't sound confidence inspiring. "More info in Discord" is such a non-starter.

I wish Valve every bit of success, if they deliver an open platform people can own and hack.

its using SteamVR, so it should work