You have to think that if he is backed in a defence of this quality, any psychological issues will ease off a bit.
When you think about the squad overall, though, you've got an excellent player in Tomiyasu benched, and an excellent player in White who could be moved to right centre half at any time to accommodate Tomiyasu's return. The competition for places is greater since Saliba's return and I suspect it's a factor in Gabriel's seemingly increased tension.