These are very simple, reductive stats that can't tell you anything real about the player. As for how they're depicted, I've had my rant about this style of diagram being entirely unsuitable for visualising the data it is depicting elsewhere so won't do it again here.
Personally I prefer the eye test, but if you like stats start somewhere with enough info to paint something of a useful picture.
Here, for example.
Those stats show a player who sticks to a very specific brief: he defends, in very high volume and with a very high success rate. He passes, at high volume and with a high success rate, and has decent passing range (again, with a good success rate with long passes.) He carries the ball well, doesn't lose it much, can beat a press. He does not make progressive runs or progressive passes. He doesn't take corners, throw-ins, free-kicks. He doesn't advance far up the pitch, or try to get assists or goals. He is not a creative or progressive player.
This is what we need. We have creative and progressive players. In Bruno and Mainoo, we have a top creative passer and a top progressive carrier. One will lose the ball more than is ideal, and one will get through less defensive work than is ideal. Both need to be fed the ball a lot in central areas to be effective. So what you need is a superb defender and sweeper who will retake possession again and again, keep it under pressure and move through a press if necessary, and then feed the ball to the others quickly and efficiently as often as possible.
Check out Zubimendi's full stats on Fbref
here. Doesn't look so impressive. Good at a few things but not brilliant at any of them. Worse passing accuracy for mid and long range passes than Ugarte. Weak defensively. Goal threat but surprisingly light on assists. Not as reliable carrying the ball.
Fofana I haven't watched as much so can't really comment - perhaps he is as excellent an all-round midfielder as that pizza chart suggests but again I'd recommend getting into the stats properly before drawing that conclusion.
