Until he signs, the rest is just background noise. Transfer rumors are what sell the papers and very many deals never happen at all even after numerous rumors. Do not get so carried away.
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.