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!

You can see some hardware information at https://store.steampowered.com/account/hardwareused. There’s an example here: https://www.xda-developers.com/how-find-steam-deck-hardware-specifications/.