i don’t have a steam deck, but i do own this “game.” i don’t think i can check steam deck specific community layouts, but i only see one community layout with my dualshock 4 plugged in. the controls are really simple though, all you need is a way to move the mouse and a few keys mapped, so it can’t be that hard to make your own layout.
(i also think it’s funny that it calls a “game” that you can’t play “playable” but that’s unrelated.)