I published a controller layout for the SteamDeck. Feel free to modify your own. I set the L5 button as a SteamDeck shift needed to change the pads from menus to a mouse. Willing to take suggestions and also know that the chat menu is not fully populated yet. Just thought I would put this out there. It is called "Microsoft Free Allegiance-Wanggen-V1.0"

Also I published instructions in the Helpline Forum on how to fix the Multiplayer Lobby.