While it would be appropriate for Osimhen to leave on this occasion, we should also not immediately judge that he will not suit Antonio Conte's coaching at Napoli next season. Because surviving with the current condition of the Napoli team is not that bad for Osimhen, just because there is interest from PSG to bring him there. Of course Napoli themselves will also see this as a golden opportunity to get more money and can use it to bring in other players.
Provided Napoli can't get Lukaku, Conte will have two forwards, so Osimhen will have a permanent place in the team, but the point here is that he has expressed a desire to leave the team, which means he may not be as effective as if he played there where he would like. Osimhen wrote on his social networks that he intends to change clubs before the end of the transfer window, and if I understand correctly, he would like to continue playing at PSG.