In my own idea, Napoli should try to keep this player for another season and even extend his contract because he is a young player and he can have shinning future next season also he can help his team to achieve more goals, but the best option for Osimhen is to join Real Madrid where they know how to use the young superstars and help them to grow.
Osimhen is still under contract with napoli until 2025. As long as napoli is willing to keep him and he will not leave to the another club. That's why napoli seeks non sense clause release for him caused by he is still having 2 years more in napoli. In my opinion if napoli may change his mind next year caused by osimhen is still only having 1 year contract remaining with napoli. it must be noted that if osimhen may not wanted to extend his contract in naples. I think that he will be leaving next year.
At present they even plan to extend the contract even though in this case there is still no agreement between Napoli and the agent from Osimhen. But on the other hand, at this time, with a large clause, even if it is possible to retain Osimhen, but when he wants to leave, I think there are still many possibilities for that, because of course the teams that are interested in Osimhen will obviously do everything they can even if the price is expensive if they are really interested this player.
As long as other club agreed to pay what already given by napoli and he will able to leave from napoli in summer but the price tag that already given to osimhen by napoli is very. It's not even richest club in the world like newcastle can afford him.
Newcastle has been making the first offer which was around 100 million for him but napoli rejected it.
That proves that if napoli wants more than it. It seemed to me that 100m was nothing for napoli as the club didn't have debt.