Indeed. Saka also knows the role well (so although not ideal) can play there in a left-back shortage.
I'd actually rather see Southgate not shoe-horn in a left back into the squad that he can't possibly see himself taking to a major tournament but instead work on "who would I play there if I had an injury to Luke Shaw etc in a tournament".
Ye behind Luke Shaw and Ben Chilwell there arent too many realistic options really. I mean he could drag along Luke Thomas or someone but would he ever play if it was important?
Will be interesting to see if Omar Richards moves back to England this summer (not playing a lot in Bayern), perhaps he could turn into another left back option.