I recently saw that wonder goal Son scored for Spurs vs Burnley about 5 years ago where he ran from the edge of his own box and spotted that he ran past both Tarkowski (and McNeil) lol
But that is a freak goal that very few players in the World can score. I assume part of the fear in selecting Tarkowski for England is him getting exposed like that against a top Nation, but it's not like a Harry Maguire would fare any better in that scenario.
Also, if the England side is as amazing as it's made out to be then the likes of Declan Rice should be protecting the centre backs from the World's best getting in that position, leaving the likes of Tarkowski to defend how he has for Everton all season. With Branthwaite along side him, there would be pace in the centre of defence anyway to make up for Tarkowski's lack of it, and he is so good with all the other attributes you mentioned.
Son is high class. probably underrated because he plays for Tottenham.
That's true, but Southgate doesn't really play a high defensive line and risky playstyle.
Maguire this season has been pretty solid, mostly was in the national team too, even in his worst prem seasons.
You have many options you could use without a big stomach ache, Brantwhaite, Guehi, Stones, Tomori, him, Konsa just to name a few.