Granted I don't keep up much with gaming communities but I personally was playing up until the breaking EAC update with no issue and don't seem to recall reading about people having problems.
Rust became unplayable on Linux a good few years before the Steam Deck-induced Linux boom. Back then the Linux share was still counted in tenths of a percent, if that.
The Milk-V Megrez can be found on AliExpress and has the ESWIN EIC7700X SoC. It lacks the V extension, so it's not RVA23 compliant but is all good for RVA22.
Granted I don't keep up much with gaming communities but I personally was playing up until the breaking EAC update with no issue and don't seem to recall reading about people having problems.