Actually, Steam OS on the Deck has a check box for Switch button layout. Just un-check that box on the settings for this controller and it will use the Xbox layout. Also, at the end, your audio mix was way too loud while talking.

I'm here cause y saw your g7 gaming sir video, i would like to know, now than have pass kind of Time, would do you prefer between both

Can you set up a profile for you steam deck where you already made the button mapping ? I just ordered one and would appreciate your input thanks .