You are right mate. Although it is a bit sad for Mbappe, he will not regret it. Because the best club in the history of the Champions League is Real Madrid. This team has won the most Champions Leagues. Madrid has not played as well as expected this season. They have lost both La Liga and Champions League titles. The team has also failed to win the Copa del Rey. But undoubtedly we will see Real Madrid's comeback next season.
Mbappe has wanted to be at Real Madrid since a few seasons ago and finally he managed to be at his dream club. So, I'm sure he won't regret it, even though the club he left, PSG, finally made it to the UCL final. Mbappe is actually happy about it.
And now they are focusing on their respective clubs. PSG has prepared everything for a long time to be able to enter the UCL final and they made it this season. So, Enrique must be aware of how to do, althought he rival will be very tough because Inter has more experience in the final than PSg.