Currently tuxDB.com found games that are Steam Deck categorized

Verified: 4758

Playable: 9797

Not working: 3945

This game's default graphics configuration performs well on Steam Deck
Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
Entering some text requires manually invoking the on-screen keyboard
Some in-game text is small and may be difficult to read

Check Steam Deck categorized games based on your Steam Name/SteamID