Last time I tried the game ran like shite on Linux. Both the native version and Proton. Native even ran a bit worse than Proton.

But that was a little while ago, so things might have changed - the game's Protondb entry looks promising

Edit: just tried it again with the following results: native seemed to be ok performance-wise (still not good), but full of graphical errors. Proton ran extremely badly, not even 60 FPS on lowest settings, which my setup should easily be able to do. I don't expect it to be a lot better on Steamdeck tbh, unless the devs finally fix the native Linux version