With Kylian Mbappe, Coach Ancelotti can arrange many different formations and all possess terrible destructive power. Mbappe's position in Real's attack is the story I'm interested in after the French striker debuted at the Bernabeu. Honestly, it's not difficult to put Mbappe in the lineup. He will integrate into the team. The important thing is that Mbappe has enough talent and dedication for the team. Coach Ancelotti will use Kylian Mbappe as a trump card to change his tactics unpredictably in each match.
I think one of the most underrated flex of having Mbappe in this Madrid team is the fact that you don't have to worry about what they'll do when Vinicius is not available. Vinicius is the only reliable LW they have in the team, and he creates the most chances, so when he got injured last season, they were winning games, but they struggled a bit.
With Mbappe now in the team, he can easily switch to the LW if Vini is not available and they'll have Bellingham play the false 9. When Vini is available, Mbappe will play as a striker and Bellingham can play behind the striker.
Madrid's attack is not a problem and for a manager like Ancellotti, I have no doubt he's going to utilize them properly. My doubt is in the midfield. I don't believe any of the midfielders are creative enough, except Modric who is old and doesn't have that much energy. Camavinga, Valverde and Bellingham are strong midfielders that can run for 120 minutes, but they're not as technical as Kroos with the ball. If they meet a very good midfield, they might crumble.