Luis Enrique has taken on many such challenges before and knows what to do when a key player leaves the team. Mbappe is certainly a good player and has contributed enough for the club so there is no reason to think that the club's performance will stop if he leaves. Since they have good financial support, they can definitely buy quality players for this money. In a few games of the season that just ended, we saw Luis Enrique deliberately benching Mbappe and giving all the other players a chance to try and figure out how their team would perform without Mbappe. The performance of the team has not been very random so if he adds some new players to the club then the performance of the club will be better than before.
Paris Saint-Germain won the Ligue One but they have to prepare themselves for next season because it's going to be an easy one for elite teams. Every club keeps fighting for their subjects and winning becomes priorities. The stats and form of PSG will reduce a bit because Kylian Mbappe is the main pillar for the progress of the club. PSG headcoach, Luis Enrique looks bother but there's absolutely nothing to think about, because he will definitely make good signings in the transfer market and not letting his team now, atleast not now that PSG beckon on him.