He just hasn't gotten used to the position usually he has always been placed as a left winger for years and he has always been reliable but now he has to be able to adapt as a center forward indeed this is not his expertise but I am sure over time he will get used to the formation currently many people underestimate Mbappe's abilities but those who underestimate do not know how difficult it is to adapt to a squad that is almost balanced and is in a big club while Mbappe is used to France with less competitive competition he is the best player in France but in Spain there are many good players so he has equal competitors which will test his performance.
Yes, Mbappe is having difficulties because of his new position as a center forward. I also don't understand why Ancelotti put Mbappe as a center forward. In fact, as we know, Mbappe is a very great left winger and this position is of course very attached to Mbappe. So it's natural that Mbappe has difficulty adapting. Because even a player as great as Messi will definitely have big difficulties if his playing position has to be changed. Maybe the reason Mbappe's position has been changed is because Real Madrid has too many great players. So Ancelotti is definitely confused about which position Mbappe will be placed in, and Ancelotti will definitely look at the center forward position. Because in the wing positions there are already Vini and Rodrigo. So it is the striker position that really has a gap at Real Madrid, because Endrick is of course still young and hasn't gotten many playing minutes. Maybe that's why Ancelotti finally placed Mbappe as a center forward.