This England team does not play wing backs, Shaw and James play LB and RB next to to 3 Cb's.
Watch Chelsea and Tottenham play with wing backs and Perisic/Emerson and Chill/James are always joining attacks high up the pitch and in and are always in around the box on counter attacks basically becoming wingers.
James and Shaw hardy cross the half way line in this team and are never even in the picture when we counter attack/launch a quick attack. It's literally just Kane, Foden and Sterling max on every attack every game.
We don't score goals because Southgate makes the front three do everything on their own.
Normal attacking full backs get forward more than Southgates "Wing backs"