I don’t know if Mbappé will be able to say no to the amount of money that PSG is going to throw at him. And I am also sure that they are going to offer him a new contract again. They are going to offer him more money. I think Mbappé is not going to accept a new contract and at the end of the contract which is coming in the year 2024, he is going to move away from PSG to another club. I believe he also understands that he is not going to have a legacy if he continues playing for PSG. He has already got a lot of money. He can earn good money in other big clubs as well.
PSG only has two options for Mbappe, first to offer a new contract, and secondly to sell Mbappe if they refuse the offer of a contract extension. PSG already realized that Mbappe likely did not want to be in Paris any longer after Messi's departure, he would not be able to lead PSG to win the Champions League title as they had dreamed of.
I just don't want Real Madrid to fail to get it from PSG even if it costs a lot, but it's worth the quality. Mbappe is interested in playing for Real Madrid, but I believe he is also interested in the Premier League which might make him a Ballon D'Or winner. The Premier League is more competitive than La Liga, but La Liga isn't bad for Mbappe.
Anyway, if Mbappe really will play at Real Madrid next season, then of course Real Madrid will have a big chance to win the La Liga trophy again. Thus, if Barcelona fail to defend the La Liga title, then it is likely that Barcelona will consider whether to keep faith in Xavi or not. Because after all, Xavi was only able to make Barcelona dominate La Liga, so if next season Real Madrid again have good domination in La Liga and it will be difficult for Barcelona to get a trophy.