For La Liga, it might not be too difficult, but Mbappe will be quite tested when playing in the Champions League. If his presence does not make Real Madrid's strength more solid, it will be very dangerous for his career. He had to overcome the competition between his teammates and become one of the players who contributed greatly to Real Madrid.
This condition should not make us worried. I feel confident that Mbappe will be another option for Ancelotti to get variety in the game. Indeed, Mbappe's position is the same as Vini's, but I feel confident that Ancelotti is able to play them together in different positions. Because Mbappe is certainly able to play well not only in 1 position. Maybe he can be a central striker, or a main striker. Maybe he can be like Ronaldo. Being the main striker and opening up a lot of space to attract defensive players.
IMO, it is very likely that Don Carlo will place Mbappe as a center forward, he will apply a combination of Vini Jr and Rodrygo with strategies and tactics that can switch positions. I mean, Mbappe can go to the wing and Rodrygo can enter the opponent's defense. or, so does Vini Jr. Real Madrid players always apply a triangle pattern between the players, passing passes around each other until one of the players finds space to penetrate or take a shot. This tactic is used when Madrid players are in the opponent's defense, different if they are counterattacking. Well, Mbappe is a versatile player and he has the same speed as Madrid's wingers. This combination can be very deadly, when these players make fast movements. However, this is only my temporary assumption, because we have not seen the performance when Real Madrid played their match. yeah, not much different as you say. Mbappe can open up space for his teammates, but as we know, Mbappe has the ambition to always score goals in every match. Theoretically, Real Madrid should be a very sharp team up front. Plus, supported by very reliable midfielders. If Ancelotti has a system that is suitable for his team, then Real Madrid will be a team that is very feared by every opponent both in La Liga and in the Champions League.