It takes time for Mbappe to become an important player at Real Madrid and I am also sure that he will slowly adapt well with his teammates.
I also believe that Mbappe will be able to adapt to Real Madrid and will become one of the best strikers in the world. Right now I see that Vini and Mbappe still don't have a good bond. That's normal because both players are important players for Real Madrid right now. Both still have their own egos. It will take time but I don't think it will be long. Vini had a difficult time when he first played at Real Madrid and Mbappe will feel the same way.
For me I even think vinicious Jr is slacking since the season began, he is not that active like he used to be in some previous season, vini and Mbappe will be of good combination to make things happen. I just hope Vinicious becomes very active and for Mbappe he is a good player still trying to get use to the new club.
I'm very sure that Mbappe will be so good for Real Madrid this season, his performance for games that have been played so far is not bad. It is very common that when players are signed into any club at first they find it difficult to bring out the best but as time goes on they become so use to the game. Real Madrid bringing Mbappe into the club is a good signing for the season which will definitely yield a good result for the club this season.