Remember when Fabinho signed for Liverpool and went missing for about 3 months? Not even in a squad. Klopp obviously done that as he was nowhere near fit enough or up to the pace abd intensity of Liverpools style or the PL
Lampard dropped Pulisic for quite a weeks and was being questioned for it, yet he looks up to speed now.
Pepe is really struggling at Arsenal and looks nowhere near a £80mill rated player
All 3 above were regulars and a lot more experienced. Kean is still a teenager who is not used to playing 90 mins in a slower league, let alone 90 mins in the fastest most intense league in the world - it will take time. Plus its one thing coming into a game where your the best team by a mile and your already winning to coming into a struggling team who are chasing a goal and the opposition has 10 men behind the ball.
We know nothing about his attitude, the whole late thing doesnt speak to a character as I bet we have all been late for work a couple of times too. But it is obvious that he's struggling with the fitness a bit - not so much actual fitness, but the intensity of the matches.
Hopefully Dunc has a quiet word with him and he reacts in the best way.