I mean I can sort of understand why Southgate picks him as he has generally done ok for Eng BUT at the same time if England have aspirations to put themselves in contention then you need to have a squad of players who are playing regularly (some may be rotated like a Foden)
Maguire is totally frozen by Man U - losing game time with every passing week
Stones - Guehi should be the pairing - then Dunk, Tomori next in line - with the likes of Mings, Colwill, et al competing when available