Why getting worried over spilled milk. Mbappe is gone for good and it's high time PSG faces reality and look for how they can get a good replacement for Mbappe, so that they can strengthen the club with the players that they have for the continuity of winning the title always, and also focus on how they can win UCL some dsy.
What you suggest is actually quite right because PSG does not need to think about Mbappe anymore for this season because PSG only needs to think about how to live this season as well as possible and must be willing to take advantage of the transfer market at the beginning of next year to target some of the best players they want. Because PSG only finds it difficult to get the UCL trophy, while for the trophy in Ligue 1 I think PSG can still fight quite relaxed in terms of getting it because in Ligue 1 only PSG has more strength so PSG is still able to get the trophy here.
I see PSG has a big project with coach Enrique after the departure of its star players, PSG so far seems to be enough to fight in the Champions League, they even do not hesitate to buy star players. PSG at that time was still strengthened by Mbappe, Neymar, Messi, and Ramos in their defense. However, they still had difficulty winning the UCL. so PSG did not buy star players because Enrique wanted to build a team from the bottom, especially the mentality. Maybe if the scenario is built now, if successful, they will be a strong team as a team.
Now that all their star players have left, it is getting harder to compete in the Champions League. Even so, they are still quite superior to League 1, and are predicted to be able to win the League 1 trophy easily without any obstacles, considering that they do not have any worthy competitors.
So in my opinion, Enrique's current goal is not to focus on chasing the UCL trophy but to focus on building the foundation first so that one day they can compete with other teams in the Champions League. It was proven in yesterday's transfer market, they did not buy star players, they did not even shop for players like Enrique who wanted to utilize academy players.