Stormworks: Build and Rescue is a popular sim where you design, create and pilot your own air sea rescue service and now it should work a lot better on Steam Deck and gamepads in general.
"Stormworks: Build and Rescue is a rich and dramatic physics playground. Take your custom-designed, block-based and programmable vehicles into fierce oceanic storms. Plan and execute thrilling rescues in a variety of challenging crisis scenarios. Export and share your meticulously designed vehicles and missions with other players via the Steam workshop."
Developer Geometa has put out multiple updates recently focused on gamepad improvements, with the latest patch released on March 11 that they said enabled you to "control the player character, as well as rebind all your controller settings, with a joypad or controller" which "dramatically improves the player experience when playing on the new Steam Deck". However, a few exceptions remain like the vehicle and add-on editor which needs either keyboard / mouse or touch screen to work with but they're getting there.
Valve gave Stormworks: Build and Rescue a "Playable" Deck Verified rating last month.