After losing Lionel Messi who did not renew his contract, PSG has potential will loss their star player Mbappe next season after announcing not to renew his contract which will end next season in 2024. Seems difficult for PSG right now, if not sell Mbappe they will loss great opportunity to earn above 100 million euros due Mbappe contract expiry on June 2024. But one side they if want get transfer fees has to sell Mbappe and seems the era or PSG have been over after leaving by Lionel Messi and Mbappe.
Left Neymar not rumor yet will leave PSG or not, he has linked with Manchester United but not official announce yet for Neymar leave PSG because he still injury right now and absent many games with PSG in this season.
It is uncertain whether Neymar will stay with PSG. However, PSG management is not interested in keeping Neymar in the squad. Neymar was a completely losing project for PSG. Neymar was signed by PSG for a record transfer fee. But Neymar failed to live up to PSG's expectations.
With Messi leaving the team, PSG may now try to sell Mbappe as well. Because PSG will be able to make a lot of money by selling Mbappe now. I would say PSG management should sell Mbappe, Neymar, and Messi all and form a completely new squad. And they should prioritize young players. And before that, PSG should look for an experienced coach.