Conte is trying to have a strong team in Napoli and make this team to win the Serie A title for another time and that is why he started hiring players even now before the transfer window officially is not open yet and the other teams start buying players. Conte wants to hire Lukaku for Napoli, he had a good performance so far in Roma however they didn't give him the enough chance and I think Lukaku is losing motivation because he said he is even thinking about leaving Serie A and the other top teams because he wants to return home and playing in his own country. In the other hand, Saudis started sending offer for him and this made it harder for Conte to have Lukaku.
There are several players that may be retained by Conte at Napoli, besides that Napoli is also starting to target several players that they will bring in according to Conte request, Lukaku who indeed has a good relationship with Conte is of course one of the main targets for Napoli to get, it seems that compared to Osimhen, Conte will trust Napoli main striker next season more to Lukaku if indeed he joins Napoli, Since it is reported that currently Napoli is even ready to make a trade-in player with Chelsea between Osimhen and Lukaku, the interest coming from Arabia certainly allows Conte hopes of getting Lukaku difficult , because in any case of course it will be difficult for Lukaku to refuse all the luxury offers that come from Arabia later.