I agree that combination of Khvicha Kvaratskhelia and Victor Osimhen was key to Napoli success last season. They worked well together and scored some great goals. It is surprising that Napoli might sell Osimhen but they must have their reasons. Osimhen is talented player who can do well at any big club. However I think it would be mistake to let him go without finding someone equally good to replace him. Napoli should be careful not to ruin the team chemistry. Keeping both players would be best but if not I hope they have good plan to stay strong offensively.
Napoli have actually prepared themselves to bring in Lukaku if they have succeeded in selling Osimhen. And yes, it is a step to keep Napoli's attack line strong after Osimhen left. But it looks like Napoli is having difficulty finding a club that can pay for Osimhen's expensive transfer. And Napoli have also lowered Osimhen's transfer price but it seems that this is not enough to make clubs interested in signing Osimhen move quickly to secure this talented striker. Chelsea and Arsenal are still linked with Osimhen but there has been no new news regarding them.
I personally think that the combination of Osimhen and Kvaratskhelia is one of the best ever. but after some problems arose there and after Osimhen suffered an injury after that I noticed something was different. Where I feel like the two of them are starting to not resonate well. Maybe because Osimhen is no longer comfortable there or because of Napoli's new coach last season who didn't have a suitable strategy there. But if Osimhen fails to leave this season then I think Conte will be able to make Osimhen and Kvaratskhelia a great pair again there. And I'll be looking forward to that.