It should be so that Paris Saint Germain will not have too much difficulty returning to dominating the league, because they are the best team with a luxurious squad compared to other teams, so for me there is no reason for them not to dominate the league. In my opinion, Mbappe's departure cannot be a reason for them to lose their dominance in the league.
However, if we talk about the Champions League, then I agree that they will have difficulties as usual. With Mbappe in the squad they are still having difficulties, in fact they once had 3 star players at once and it didn't have any impact on them. Now they have to realize that star players alone are not enough to bring them success in the Champions League, so they have to have a winning mentality too, and that must be owned by the team as a whole, not just by individuals or just a few players.
Since being taken over by Nasser al-Khelaifi in 2012, PSG has been able to dominate ligue 1 and I am quite sure that in the next few seasons PSG will still dominate ligue 1 as long as there is no team that is able to match the finances owned by PSG today, losing mbappe is of course a very big loss for PSG, but this will not make PSG lose their dominance in Ligue 1 later, currently we do not find any team other than PSG that does have a quality squad, so it is certain that next season Enrique and PSG will continue their positive trend in Ligue 1.
PSG performance in ligue 1 and the Champions League is of course inversely proportional to today, it should indeed be when they had Neymar, Messi and Mbappe in their previous squad of course it was not difficult for PSG to win the Champions League at that time, but indeed what is PSG problem today is not the depth of their squad but the champion mentality that they do not have at the moment, PSG has always won ligue 1 but the ease of competition in ligue 1 has actually made their mentality in the europa league very weak so far.