lukaku will never be able to replace Osimhen for the simple fact that to score all those goals you simply have to do them and lukaku has been a static player for too long and is not capable of scoring all those goals now if Conte likes them they will surely take him but they won't take him I see myself capable of such an adventure
Lukaku was actually a great striker in the past and was almost on par with Oshimen, he has achieved extraordinary results with Inter Milan but his performance has declined over time. I think it's natural because age can sometimes also affect a player's performance. Lukaku really can't replace Oshimen because if he is study carefully Oshimen is better than Lukaku at the moment he is still young and of course still has strong performance but no matter what Conte wants this player and it looks like Napoli really want to make a lot of profit by selling Oshimen even though I don't know what condition Napoli will be in next season if Oshimen leaves I don't think Lukaku is enough to strengthen Napoli.