Now, there's a high chance that he moves after the season. How will PSG cope? New signings?
At the moment I don't see any young PSG academy players having a candidate capable of replacing Mbappe for now. One of the best ways is to take advantage of the transfer market by buying new players. Some media outlets suggest that Victor Osimhen, Rafael Leao, Bernardo Silva are reportedly new targets to replace Mbappe if he leaves. After he officially leaves, Enrique must be able to make a collective game, not rely on 1 player.
In my opinion, Osimhen and Leao are important targets. PSG may try to bring them to the team instead of Mbappe. I don't think Milan will leave Leao because he is an important part of a team with high goals. However, Osimhen can leave Napoli with a good transfer fee. I believe he will be successful in Paris, too. I think he will not be as successful as Mbappe, but he will still be good.