We've conceded 19 goals in the 13 games he's started. Nearly 1.5 goals a game. That includes 5 against Leicester, 3 against Newcastle and 3 here.
Our overall record this and last season is about 0.65 a game.
I do like him, but it seems clear to me he doesn't fit in yet. As others have mentioned, communication with Zinchenko in particular is poor and that side of defence does look very small when they're together.
At the end of the day he's the 4th choice CB...he's not going to be world class. He'll probably be a lot better after the EFL cup games with more football under his belt.