Grounded 2 from Obsidian Entertainment and Eidos-Montréal recently had quite a big upgrade, and now it should work better on the Steam Deck too.
Named the "Hairy and Scary Update" it brings with it AXL, the Colossal Tarantula, which is incredibly creepy. A better building system has been added in too with a grid system to make snapping all your stuff together easier than ever. There's also upgrades to the buggy, new buildings, support for Japanese and Brazilian Portuguese, a new Praying Mantis Armour set and other assorted general improvements.
Specifically for the Steam Deck they noted they "Fixed an issue where Grounded 2 did not launch properly on Steam Deck" and "Tweaked Steam Deck Settings with the updated Graphics Options in the settings".
Check out the update trailer below:

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