There's no news of Napoli nor Victor Oshime leaving Napoli for Ac Milan.
Even if he wants to leave Ac Milan has spent enough for them to match the fee set-up by Napoli. I have only seen the new which has to do with Villarreal playmaker leaving for AC Milan. They will have to go harder this season. Same is for Juventus who are currently chasing Vlahovic to get Lukaku from Chelsea. But Oshime leaves or not, Napoli will never be the same way they did last season. After thirty years, they finally made the fans proud by winning the league.
Yes, there is no confirmation yet on Osimhen. He is most likely to stay at Napoli until 2025 when his current contract will end. Although I learnt that PSG is in talks to try and negotiate with Osimhen I doubt that it will yield any positive results as Napoli will still want to hang on to him. I heard a rumor; I call it a rumor because I am yet to confirm that a Saudi Club wants him. If this is true, if he goes there his budding career will be ruined forever. As he will be playing for the money not for the growth and development. His shelf will be lacking in championship titles, and awards and medals. He may even regret it.