The manga is handled by Kishimoto's former chief assistant Mikio Ikemoto and written by Ukyo Kodachi.
Ikemoto was recently in a interview to celebrate the launch of Shueisha's Manga Plus program, and mentioned that he has a window for when the bring the series to end.
When asked whether or not he had a set goal in mind for Boruto: Naruto Next Generations' future,
Ikemoto responded that he is aiming to end the sequel series within 30 volumes, he states "My utmost priority is to complete the entire story for Boruto. That said, I do not want the story to sprawl out too much. As the original Naruto series already has a whopping 72 volumes, I am hoping to complete the story within 30 volumes to keep the entire saga within a hundred volumes altogether."
Ikemoto is still keeping the series as a crucial part of the entire Naruto franchise. Rather than make it a completely standalone series, he's still framing it within the Naruto story as a whole.
Naruto fans should be excited to know that many of Boruto's developments will still be within the original Naruto series instead of branching off into its own 70 volume franchise. The implication here is that Ikemoto most likely has a idea for an ending in mind, which could very well tie back into the series' opening scene featuring an older Boruto and Kawaki fighting in a ruined Konoha.
Boruto: Naruto Next Generations is currently at seven volumes as of the writing, and with the series in general for it's monthly schedule, it could be around for a very long time maybe. Even if Ikemoto does not fully hit the 30 volume mark that he wants, fans will hopefully be glad to know that when the sequel ends it will bring the entire Naruto franchise to a close.