yeah, sure, I'll say it here, 4.5 years late.
booted up the linux version on the steam deck. performance was undesirable. I don't like the term 'slideshow,' but after the first courtyard, I was getting a sustained 4 fps. at that framerate, simply opening the menu was inconsistent, the engine dropping inputs. battles ran well, early ones anyway, this is an overworld problem.
windows version + proton ge ran just fine, which suggests the rpg maker's linux support is wholly underbaked.