I also think that this kind of ego thing from Mbappe was already thought about by Real Madrid when they wanted to recruit him into the Real Madrid squad. And what you say is also true that Carlo Ancelotti can definitely handle things like that at Real Madrid and keep the atmosphere peaceful between all the players. Because Ancelotti not only has experience in training any player, but also has a way of not giving birth to any ego in any player he trains.
What people don't know is that Don Carlo had a knack for diminishing the egos of star players. I have never found Ancelotti to have any problems with his players. This shows Ancelotti's charisma as a coach who is respected by his players. Mbappe will play with Real Madrid next season and that means in my opinion Real Madrid will be the strongest team in the world.
They should think about an alternative player but that won't be easy at all because there is no player to take this risk and move PSG and there is no team that lets their player go easily.
Now we can understand why a team should not be dependent on one player.
In my opinion, currently there is no player who has the same level as Mbappe at PSG. This makes PSG continue to depend on Mbappe's performance and this has been proven. PSG doesn't seem to think that Mbappe will not renew his contract in February and this has become a big problem for PSG. They will find another striker in this transfer window but it will not be anyone like Mbappe. Although I'm sure PSG will win Ligue 1 again, as usual.