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You may be right because we have not really heard anything in regards to that case about the Nigerian player in Napoli, perhaps it could be that Napoli has realized that the player still have a lot of things to offer them if they decide to keep him, well considering the condition of the transfer market were every club is currently trying every means possible to make there club strong no club will like to sell there player that's still very active on there front line, so I agree with you because with the look of things I don't think he will be leaving Napoli this season maybe if they are to sell him it will be after this upcoming season because the competition is too much on this season.
If the player you mean is Victor Osimhen, then I think Napoli still really deserves to keep him in the squad next season.
Osimhen is the center forward most targeted in this transfer market because basically Osimhen is a quite productive striker. He is good to play as a target man in the game schemes of many coaches, including Luis Enrique. But I agree that it seems Napoli are not ready to let him go.
Napoli could certainly sell him if they found a worthy replacement, but this is a challenge. It is difficult to find a player with the same goal productivity as Osimhen, even if there is, Napoli must be prepared to pay a high price for that player because other teams also expect big profits. Not sure if Osimhen will go to PSG next season, but maybe it will be good for the player's career.