https://wccftech.com/valheim-steam-deck-verified/

Developer Iron Gate AB has announced that Valheim is now officially Steam Deck verified. 

Earlier this month the Valheim team already deployed an update offering support for Valve's new handheld, and the Swedish developer has now taken to Twitter to confirm that its Viking-themed exploration and survival hit title is now entirely compatible with the Steam Deck. This includes the game showing in-game Steam Deck controller icons, as well as all of the game's functionalities being accessible when using the default controller configuration on Valve's handheld. In addition, Valheim's default graphics configuration is working great on the Steam Deck.