Napoli's chance to get in top four is very small and they firstly have to aim at top six to join either UEFA Conference League or Europa League next season. When they enter top six, they can think of higher position and see how good their chance to achieve it is at that time.
Osimhen is an excellent player. He has the ability to score a lot of goals. And with the help of Osimhen, the Napoli side dominated Serie A last season. Now Osimhen is in good form. If he plays well it will be easier for Napoli to perform well overall. But if Osimhen's performance is erratic I won't expect much from Napoli this season.
Napoli's opponents in the next two matches are relatively weak. The team will play against Cagliari and Sassuolo. These two teams are relatively weak opponents. If Napoli cannot return to form in this match, they will not be able to perform well in the upcoming matches.