If Osimhen comes, he will achieve great things at Real Madrid. He is a player who is very strong physically and does not give up on double fights. He left behind a magnificent season in Napoli. I think he won't have any problems scoring goals as long as Real Madrid has great players behind him who can pass the ball to him. Osimhen and Mbappe can both play for Real Madrid.
I don't know where this Osimhen speculation has come from. But I don't think we will see Osimhen signing for Real Madrid next summer. I mean Real Madrid's priority would be to bring Mbappe rather than Osimhen. You know Mbappe is in his last year of his contract now. If PSG can't find something to convince him to stay for 1 more season then he will be available for free transfer.
Real Madrid must be even waiting for January to make their contract offer to him. Even though he would be able to join by next summer it is important to start the negotations as early as possible.
Osimhen might think of extending his contract with Napoli too depending on what Napoli will do this season.