The best scenario for Luis Enrique and PSG is to release Mbappe so that the focus of the other players in the squad is not divided by the contents of the transfer. There are many things that Enrique has to fix, not just Mbappe alone, my prediction is that if Mbappe still refuses to extend his contact then he will be released next season. If Neymar stays at PSG so he can be relied upon for another two or three seasons, Enrique only needs to organize the squad from the defensive and attacking midfielder sectors.
If you read the news about their transfer market, the arrival of several new players made Enrique have to let go of several players to streamline the squad, I think it is very likely that players returning after a loan spell like Icardi will be released in this summer's transfer window.
IMO, what Enrique is facing is not as easy as we say. but if I may assume, Mbappe is still very much needed by PSG. especially now, PSG are targeting Vlahovic. suppose Vhalovic joins PSG. at least, PSG still has a very sharp front line. there is Mbappe, Vhalovic who is the center forward and Nyemar or Asensio can fill the right wing. Alternatively, Enrique rotates players according to his needs. but PSG will not allow it, because if Mbappe is not willing to sign a new contract. His future with the club is uncertain. however if I refer to other reports, as I presume. that Neymar still wants to play for PSG, at least for the next season.
As Romano said, Neymar about his future. "I hope that at PSG (next season) I have a contract, no one told me about anything. Well, I'm pretty sure with Neymar's statement, Enrique will probably include him in the list of players included in his project. Ideally, Enrique should persuade Bernaldo Silva to join PSG. Because after all, it's not possible if Silva forces him to move to Barcelona. Anyway, actually now PSG still have a pretty good squad. It's just, they still have to bring in some newcomers. And if Mbappe leaves, maybe that's even better. Because, no Again, there are players who have special features, so Enrique can focus on building a PSG squad to make it more competitive.