Steam itself has remapping functionality to extend any gamepad with customization. You can remap (and much more than just rempap) all keys and elements of a gamepad through the Steam Controller setup. People have uploaded their configurations, so you can download them. But this extended custom functionality is only for Steam.
I was talking about the custom profiles with Steam Input layout created by the community. Not sure if any game has this by default made by the game developers. https://partner.steamgames.com/doc/features/steam_controller/browse_configs (the link talks about the Steam Controller, but the concept is the same on Steam Deck)