It's time for Napoli to find a suitable replacement for Lukaku to fill the void in their forward line. I'd even say Napoli shouldn't expect anything from Lukaku this season.
Lukaku has a serious injury that is expected to take three months to heal, and there's no guarantee he'll be able to return to top form after recovering from it. Now is the time for Napoli to race against time before the transfer window closes to find a new striker.
They have to hurry up and find a good replacement, and it takes a lot to replace Lukaku, Conte bases the team's entire action on that player who takes away at least 2 men, always in the attacking phase, replacing him won't be easy, it takes physicality and a lot of mentality