These are valid reasons enough for Napoli to want to agree on a good fee with Galatasaray this summer so he can leave to avoid a situation where they will have to lose him for free or for a fee way smaller that whatever Galatasaray will be willing to pay now for his signature. In my opinion the right time to make it happen is now.
And the mixed news is that there is no agreement from the negotiations, whether they fail or succeed, they are all still ongoing. Napoli still hopes to secure a guaranteed €75 million, and Galatasaray, who are also in Italy, are conducting the negotiations. CF's contract with Napoli runs until June 30, 2026. And if they can only provide a loan to Galatasaray this time, then their opportunity to sell Osimhen is indeed over, because it could be a free transfer in the future, and wouldn't this be a loss for Napoli? However, Napoli is still holding out for the deal fee.
Source: The deal for Victor Osimhen has never been off so far