If Chelsea have Nkunku already signed then there is no further need for Victor Osimhen who seem to be a top target for Manchester United in the summer. Chelsea already have options in that position so if Victor Osimhen also joins then it is unlikely that Joao Felix will be signed permanently in the summer and Aubameyang already is leaving in the summer too but what then happens to Broja, Kai Havertz
Chelsea can have both Nkunku and V. Osimhen without any problem but if you say it in comparison I'd say Osimhen is better and should even play ahead of Nkunku. Osimhen wanted to play for Chelsea which he has been wishing for is a right time for the blues to go and get him, and I don't think Manchester united can win the race of signing him. At the end of the season Felix will be going back to ATM and the likes of Broja and Havertz, they can start from the bench that's when they secure the deal with Osimhen. Broja hasn't had his best on the blues uniform but Havertz has been on the play and he needs someone to help him out on the field, he needs an understanding teammate upfront.