but here the direct link to the controller config, apparently it's possible to share with steam friends a controller layout like that( to open somewhere on steam, the steamdeck )
I don't know why, but you can choose the basic Keyboard(ZQSD) and mouse setup, and change Jump, interact etc as your wish. And use the steam deck pad mouse to interact with the Menu.
Comments
steam://controllerconfig/2580020/3368752223