Basically, Mbappe will not be able to do as he pleases, a bit like he did when he was at Paris saint Germain, in PSG he was the top player pampered by everyone and had no major rivals in his role, at Real Madrid he will become one of many top players and the starting place is by no means assured. So he better be respectful of the locker room hierarchies
Mbappe has a privilege at PSG so that he does have a behavior and also an ego that does make him feel powerful over other players in the team and also the coach, after extending his contract with PSG two seasons ago, Mbappe got the privilege to set manage players and also determine the coach to be fired or stay according to Mbappe wishes, so that is what makes many conflicts occur within the PSG team and of course has an impact on stability and also PSG performance so far, after joining Madrid, of course he will not get this privilege later, so far we know that Mbappe is a star player that Madrid continues to covet, but that does not mean Madrid will prioritize Mbappe over other players in the squad.
Ancelotti is a very experienced coach so of course he will be able to handle players like Mbappe in the squad, besides that all this time we know Ancelotti as a coach who is indeed very firm so that he does not hesitate to Pulling out star players because who are not in accordance with expectations and also follow his instructions.
Mbappe will get privilege base on his performance and contribution to the Madrid's team but isn't something that will happen immediately but with time and base on his contribution in the club, you can take this part away, basically the fact that when these big name players joined a particular club most of them usually get special treatment from their manager and also further having more influence or say in the team than every other player in their.