Napoli are trying to sign a new deal with Osimhen also. They think of putting a release clause which is worth 160 million euros too. If they become successful on this task then they should be completely relieved about his probability of being signed by another team for more years. Otherwise he has only 2 years left on his contract.
The test that will make Osimhen prove his worth is in the coming season, when hopefully he replicates his performance.
I have no doubt that the same clubs that he is interested in, but they seem less interested in him, will come calling to sign him at a better offer.
I don't know how true this is, but it is about PSG having an interest to sign Osimhen. Apart from the Champions league, these two teams, PSG and Napoli, don't come close to the style or level of English football, let alone the fan base. It might be difficult for Osimhen to play under Ten Hag, unless a new manager comes in.