I would guess that PSG may go for a manager change as well. I know that is not talked about a lot right now and maybe that won't happen but I think that they need a bigger name. I have always said the same thing and I will keep saying the same thing until I die, what PSG needs is Zidane. They will win the league and the cup anyway, they already win the league all the time and if they cared a bit more then they would win the cup too, that is just expected at this point.
However, if they get Zidane then they may win the UCL as well, he can build a team that would be better than the current one, even without Mbappe. Dude knows his own style and he knows attacking football, if nothing else it's guaranteed that they will have fun games to watch.
Zinédine Zidane would have been PSG coach for a long time if he really wanted to, but after not being at Real Madrid he actually rejected all offers from other clubs and reportedly his desire was to become coach of the French national team, but the FFF preferred to extend the contract of Didier Deschamps.
Lusi Enrique is also not just an ordinary coach in my opinion because he has quite good achievements with Barcelona, so PSG choosing him is not the wrong thing.
In my opinion, why PSG is only strong domestically is because they made a mistake in building the club, they keep changing coaches every time they fail, making it even more difficult for them in the UCL. We can see Manchester City who didn't immediately replace Pep Guardiola after several seasons City hasn't been successful in the champion league until they finally get what they expected.
Having the same coach stay longer at one club will make it easier for him to build the desired team rather than continuing to change.