and regarding Mbappe, it is certain that Mbappe is much younger player who has the ambition to win the UCL title and titles in other competitions so it possible that Mbappe will still leave PSG in the following season to look for the right team that can lead him to achieve this. that he wants and I think Real Madrid. all of this is not only about money, but Mbappe really wants his name to be known as star player who has had a successful career getting a lot of titles while it was still easy so that too long at PSG without the guarantee of getting a title in another competition such as the UCL or the European league is just useless for him.
PSG still seems optimistic about being able to keep Mbappe. and I think maybe there will be other talks with players. We can never know what Mbappe wants. he made several controversial decisions with one of them not extending his contract with PSG and previously also rejected Madrid's offer.
if Mbappe wants titles I think he should leave PSG. it's not without a chance that they can get the UCL title, but this season has not been very good for them. Even last season with Messi and Neymar in the team it didn't make PSG lucky in the UCL.
PSG may have to prepare to find a replacement for the worst possibility that Mbappe will not be with them next season.