It is indeed possible to happen but I see from another side that the match between two top teams will produce different performances, Napoli and AC Milan are both productive in the last few matches but I will not bet on BTTS in the next match in my opinion betting on Napoli's victory has a greater potential to win the bet, they are in their best form at the moment and overall Napoli's strength is slightly better than AC Milan.
Napoli have been strong since the last season with Conte while AC Milan had to start their rebuild with Allegri since this summer and they did not begin this season smoothly. With time, several matches, Allegri and AC Milan players tend to work with each other better that is shown by their better performances and results too. Facing Napoli is difficult for all clubs in Serie A but AC Milan have their pride as one of most successful clubs in Italy and they will fight as best as possible for not only one point, but also three points from Napoli.
As long as the Napoli club continues to provide what Conte needs to build the Napoli squad to get better from season to season, then it is not impossible if Conte will be able to bring Napoli to become champions in Serie A in consecutive seasons.
And it has been proven that Conte is indeed able to improve this team quickly. In the last season, for example, he was immediately able to bring Napoli to become champions. Even though it was his first season at Napoli. But he immediately returned Napoli's performance to a good level.
Conte accepted challenge to take a head coach position at Napoli and last season he made big surprise by leading Napoli to Scudetto when they lost two best star players, Osimhen and Kvaratskhelia. In this season, Conte and Napoli are defending their Scudetto and so far they have been performing well and likely make more pressure on competitors that want to take over Scudetto from Napoli.
Allegri is very experienced and I think he will be able to help AC Milan constraining Napoli and get at least one point from Napoli. The honeymoon of Napoli and Conte since the season beginning must stop somehow and perhaps AC Milan will be a club for this mission of Serie A.