Even though Antonio Conte himself is reportedly willing to let Osimhen go to another team, perhaps it is because the striker does not suit his strategy that he insists on bringing in Lukaku.
I'm not supporting Osimhen and I still don't know what's interesting about Lukaku, even though sometimes he plays well but sometimes he plays badly, why doesn't Conte keep Osimhen again in the new season to become a player who can be expected to bring new changes for Napoli again next season, we will never know in the Conte era the new season will come, who knows, Napoli will play as well as the previous season where they can get the Serie A trophy with good results. Conte must be able to save several other players so he can rotate players when there are injuries, of course he will not lack players on the front line if Osimhen is still at Napoli. 
Osimhen might not leave Napoli soon only if after the end of the ongoing competitions, other clubs show interest on him. Arsenal is no longer interested in Osimhen even after Napoli reduced the price. He should accept whatever comes his way and move on with his life in Napoli till his time will come to leave the club.