The fact is that the big teams in Europe are not interested in him, if they were they wouldn't think too much and would pay the amount that Napoli wants, I don't know what bad luck this guy has that he can score a lot of goals but is ignored by the big clubs that are preferring to spend a lot of money on other players who don't even score many goals.
For the current transfer market, there are indeed not many European teams eyeing Osimhen's signature, but it was different in the previous few seasons. It is too complicated for Osimhen's transfer issue, besides the player asking for a very large salary, Napoli themselves also set a very high price, making several European teams reluctant to recruit him. If this season's transfer market does not go smoothly for Osimhen, then I am sure that in the next season the interest of top teams in him will decrease.