The reason England have 2 goals in 270 mins and conceded none is the setup, the back four play deep, the fullbacks are not allowed to cross the halfway line and the 2DM's are not allowed to pass the ball forward, only to recycle the ball passing sideways and backwards, a setup like that tends to stop getting hidings, but you won't create or score much.
You can tell Mourinho is Southgate's coaching inspiration, 4231 formation, 2 DMs, Fullbacks that stay in line with the deep lying CB's, and 4 attacking players.
Is it no surprise this England team is as dour as Mourinho football teams the last 10 years.
This type of football would have worked in the 00's, but with 433 the vogue formation, pressing, defensive highlines, attacking fullbacks playing as wingers and a controlling #6 with two 8's and inverted wingers is making Southgate look pretty dated and stupid for the World to see.
You can clearly see why he won't risk and pick the likes of Sancho, Arnold, Chilwell and Grealish (who only played because Mount was out), they are modern day players who he doesn't understand how to use, they are players to complex for his limited footballing IQ to know how to use.