Even though Jude Belligham is Real Madrid's top scorer at the moment, in my opinion they need a single striker as a solution to make their front line sharper. Joselu was not an alternative when Real Madrid reached a dead end because his style of play was not as prominent as that of a classy striker. When Real Madrid has a world-class striker like Mbappe, if they succeed in bringing him in, their game will be much more terrifying, like when Benzema, Ronaldo and Bale play together.
Yes, this is the desire of Real Madrid fans to make Kylian Mbappé a part of Real Madrid by signing him. Because now current Kylian Mbappé is the best match-up Real Madrid player in the market. Moreover, your point is absolutely correct that now Real Madrid only needs strikers like Kylian Mbappé; however, Carlo Ancelotti has also shown a lot of improvement in Real Madrid's tactics. In addition to this, Real Madrid's father, papa Florentino Pérez, has also given a player like Jude Bellingham By signing a long-term commitment in the future, the team has been blessed with a player like one of the best midfielders. Moreover, if the signing of Kylian Mbappé is secured or completed, Real Madrid will become like the BBC trio of Bale, Benzema, and Ronaldo. In the form of a new player, it will revive the history of Real Madrid's club legacy.