I think there will be a big transfer race for Osimhen in the summer. We know that Galatasaray, where he is currently playing on loan, also want to transfer him, but I don't think Galatasaray will be the preferred choice due to the low probability of success in Europe, both financially and due to the quality of the league. If Manchester United can get the Nigerian striker, they can be a very effective team in the attacking line next year.
Manchester United wants or needs a smooth striker, but forget the loads of managerial problems that demands immediate attention in the club. In as much as everyone wish Osihmen well, playing for the red devils, the club changes coaches like clothes. And since Amorim wants the Nigerian, what would be the player's tempo when the coach who procured him is removed? The newly employed manager may not want to feature the striker, which will be detrimental to his career, considering the high level of competition in EPL.
The top Galatasaray striker is better off with clubs whose management look out for long term managers to hold and control the player's performances. For instance, Amorim once mentioned in an interview that he wouldn't be given enough time to spend in Man U, like Arteta was given in Arsenal.