Neymar will leave psg, they don't want him in the club again and they are only waiting for good offers for him. Messi has left the club, now it is possible that psg are going to lose Neymar and Mbappe too, i don't know if that is a good or bad thing for the club, since the era of superstars hasn't worked for the club, maybe the club without too many superstars would be good and successful for them. I don't like how psg run their club, they don't have good owners, and that may be their main problem.
Neymar and Mbappe are still PSG players, but Messi has already left for Inter Miami. The two mainstays of PSG are likely to also leave with other teams either in the same way as Messi or being sold at high prices. Several Premier League teams are interested in Neymar's signature, as well as Mbappe, but so far I haven't found them really wanting to move.
In the end it is always possible for PSG to part ways with their superstar, but they will get a suitable replacement in the future due to their strong financial support. PSG have signed several players right now, so they will still be the favorites in Ligue 1.