That's great to hear as a fellow Reverb G2 user. Starting with Windows 11 24h2 they dropped all Windows MR support. It looks like there's also a driver called "Oasis" now which restores functionality on Windows.
Yes, for a while there was no Windows support and they were extremely cheap, a great HMD for racing sims on Linux. The emergence of the Oasis driver has increased demand for them again but they're still a bargain.