I think people keep making mistakes about Osimhen and his performance in the recent years. Osimhen had a good performance when Spalletti was working there as a coach and this made people think Osimhen was a great player while one reason for Osimhen to have better performance was the strategy of Spalletti and it was not because of Osimhen himself.
Does'nt matter if Osimhen plays in PSG or Napoli the thing thing about Osimhen is we can't expect to see a miracle from this player.
But a player cannot be good just because he plays with some coach, and then he will be an ordinary forward because the coach has changed. I think the team plays a role, because Osimhen was good when Napoli became champions, he cannot act separately from the team. Sometimes it happens that a team starts to play better with a certain coach, but many factors play a role, both the coach and the players.
In fact, I think that Osimhem could score more goals at PSG than he does at Napoli, because PSG is an attacking team, and Napoli were like that with Spalletti, it is always easier for a forward to play in an attacking team.

I also think Osimhen can perform better at PSG. Luis Enrique is rebuilding the PSG squad. Luis Enrique is building a youth-oriented squad. We may see this team improve slowly, but it will be long-lasting. Luis Enrique and PSG management have long-term plans for PSG's squad. PSG have spent a lot of money in the last few seasons, but it hasn't really paid off. So now the PSG management has hired a coach like Luis Enrique to revamp the PSG squad.
Osimhen performed superbly with Napoli in the 2022–23 season. He scored a lot of goals and assists. Osimhen was not present in several matches due to injuries in the last season. However, Osimhen managed to perform well enough throughout the season. Osimhen has the potential to score more goals with PSG's squad. Moreover, Osimhen can become more experienced if he is with an experienced coach like Luis Enrique.