https://wccftech.com/persona-4-golden-steam-deck-verified/

Persona 4 Golden is now a Steam Deck Verified game, according to the game's Steam listing.

The fourth main entry in the series by Atlus was among the unsupported Steam Deck games, which was likely due to it not running well on Linux, so the fact that it is now a Steam Deck Verified game suggests that work has been done to improve the situation on Proton.