[detaro]

AMDs open driver runs games with HDR quite well on Linux, so that specific thing is not preventing it.

[ThatPlayer]

I've found it depends on the GPU. My older AMD GPU, a RX580 applies, a green tint with HDR enabled. My Radeon Vega APU's performance is terrible with HDR enabled. This is with Bazzite/CachyOS in Steam mode: HDR works fine with a newer GPU.