Gaben is also an FF XIV player, and Proton always gets a hotfix like a day after anything breaks (usually it's the launcher).

If bans from playing on Linux (or at least the deck) were common there'd be a lot more info about it like there is for other games. Just don't cheat or use sketchy mods. I've only played on Linux (all AMD tbf, both desktop and steam deck, so the drivers are good) and have never had a problem.