There is no official English physical release of the manga as of now. And you will not find it on huge aggregator sites like Crunchyroll Manga or Manga Plus. Azuki is the key.
If you’re looking to dive into the world of rhythmic gymnastics with Bakuten!! (Backflip!!) bakuten backflip manga read online
A week later, in a university practice hall, Rin watched the gymnastics team warm up. A freshman attempted a backflip and froze halfway, trembling. Without thinking, Rin crossed the gym and stood behind her, hands close but not touching, a steady presence. “Look for the light,” he said, remembering the panel where the protagonist focused on a single point above the crowd. She tried again, found the light, and landed. There is no official English physical release of
For the original Japanese text, sites like Comic Days (run by Kodansha) often offer the first few chapters for free as a "trial" read. If you’re looking to dive into the world
A quick Google search for "Bakuten Backflip manga read online free" will yield dozens of results like "Bakuten Manga Dex" or random WordPress blogs.