Another method is to save the config as a template. The whole situation is so frustrating because before the switch to the Deck UI there was another tab which listed your configs for other games. I hope they bring that tab back at some point!

It’s such a shame. I really hope they make it editable at some point!

The closest I ever got was just using two controllers. I really hope Valve will make a new controller for the Steam Deck and it’s able to be split in half.