Before a deal is done we probably can't conclude because there is still a possibility that other teams will try to approach him even though Osimhen himself is open to moving to Old Trafford. The rumours are indeed being discussed a lot in several online media and maybe Manchester United are trying to negotiate.
I hope he plays for Manchester United next season because his presence can increase Manchester United's attacking power to be better because in terms of quality Osimhen is a pretty good striker.
Osimhen is a great forward and for Manchester United's attack this will be a good move, I am just surprised that he agreed to play for a team that could potentially be left without European Cups next season. But if you compare the Turkish League with the Premier League, then everything becomes clear, he chooses a stronger championship. Galatasaray showed that they cannot compete with European teams, this could also play a role in his decision.