You missed something, Bellingham didn't score a goal but he scored an assist for Vinicius, so statistically Bellingham contribution is very clear. I think this score proves that in the match against Dortmund without this assist, Vinicius would not have scored a goal. Regarding the arrival of Mbappe, this will create more balance. Just imagine that Vini, Bellingham and Rodrygo can win trophies, especially with Mbappe, it makes sense that Real Madrid has a bigger chance next season.
Bellingham has played a big role in Real Madrid's number of goals this season and in terms of assists even though Jude is not a front player like a striker. Bellingham's huge contribution is known by everyone since arriving from Dortmund. His assist to Vinicius in Real Madrid's second goal further established him as a figure who contributed in the final match.
Mbappe's arrival is good for increasing competition for Real Madrid's front position. But unfortunately Mbappe is not a player who is purely an attacker, but more of a winger. The competition I mean is with Vini and Rodrygo. One of the two will be eliminated if Don Carlo still sticks with the formation used for Real Madrid this season. The most likely to be eliminated is Rodrygo.
But I'm sure that even though the competition for the main places becomes tighter, Madrid doesn't seem to be sacrificing one of them, either Vinicius or Rodrygo. For Ancelotti, Mbappe presence is certainly a big blessing, where next season Ancelotti has very good rotation options. Indeed, in certain situations, Ancelotti will feel confused about determining his starting XI, because he has players who are almost as good.
Meanwhile, the more important thing is to reduce the egos of these star players, so far Ancelotti has managed to do his job very well. Competition is necessary, but sometimes it can also backfire, it all depends on how you manage it. Armed with experience coaching a number of star players, it seems Ancelotti will have no difficulty managing the Madrid squad next season.
On the other hand, Ancelotti also has the opportunity to field these three players simultaneously on the front lines, of course we have often seen Ancelotti experimenting with a number of players. Camavinga, Tchouameni, Valvarde, Rodrygo and Bellingham have all has been played in different positions, change Mbappe position is of course very possible, and he has above average individual qualities so it is easier to adapt to his new assignment.