Osimhen can be a very important player for Manchester United. Therefore, his transfer will be a great plus for the Red Devils. However, the real question is whether they will be able to make this transfer. Napoli wants a fixed fee for the transfer fee. Maybe they can offer them a Hojlund swap. If Napoli includes the young player in their plans, they can add Osimhen to their squad for free. I think Osimhen can be more useful in Manchester United.
You are right, Osimhen would definitely be more useful if he joined Manchester United, because in Napoli he can be said to be no longer considered. Not because he played badly, but it was all caused by personal problems that Osimhen had with Napoli. So that's why Napoli currently does not make Osimhen a main player anymore, even this season Osimhen was loaned to Galatasaray. That's why rather than Osimhen's fate being unclear at this time, I think joining Manchester United is the right solution.
Because currently Manchester United really needs a striker who is hungry for goals like Osimhen. So with that, it is certain that Osimhen will be more appreciated if he joins Manchester United. But the problem is that currently Napoli has set a fairly expensive price for Osimhen's selling price. So of course this will be a bit burdensome for Manchester United. Because currently Manchester United is certainly able to buy Osimhen at the price Napoli wants. But the problem is that Manchester United needs to buy other players again.
That's why Manchester United will definitely have a little objection to the price that Napoli wants. But if as you say Hojlund is an added value for Osimhen, I think it can be done. But the question is whether Hojlund is willing to join Napoli.