Dubbing takes time. Cartoon Network prioritizes Ben 10: Reboot (the 2016 version) for younger kids. Omniverse is considered "archive content." However, due to massive fan petitions from Tamil Nadu, the studio recently resumed dubbing the last 20 episodes.
If you want, I can now:
In a small town in Tamil Nadu, a young fan named Kavin spent every afternoon scouring the internet for Ben 10: Omniverse ben 10 omniverse all episodes in tamil new