Napoli are working on a contract extension for Osimhen. He has drawn the attention to himself quite much after his amazing performance in the previous season. But as his cost is going to be quite high for the other teams interested in signing him I don't know if any team would make an official offer. Napoli must be asking for at least 130 million euros.
His salary is nothing for a player like him now and this gives Napoli an advantage to convince him for an extension. I assume he would demand a couple of million euros rise in his salary and I would expect Napoli to accept that. As he has 2 years left there Napoli had better secure his future there.
Osimhen's price is too expensive making it difficult for other teams to get him but it will also be difficult for Napoli if Osimhen asks for a fantastic salary increase, there are several teams interested in Osimhen like Manchester united but the official offer from this Premier League team has not come and now it is reported that Osimhen is ready to extend a new contract with Napoli, this will benefit Napoli but not for Osimhen in my opinion because a player who is still young like Osimhen needs to find a bigger team to be able to support his career.