Prison Architect 2 from Double Eleven and Paradox Interactive was recently revealed with an entirely new look, and while the original has full Native Linux support, the sequel will not.
Native Linux support was often problematic because too many developers would use a third party to port the game and then fail to maintain it.
I absolutely love the Steam Deck and I’ll easily take the trade offs that Proton gives us. Maybe one day Linux will gain enough market share to justify more first party native support.