Questions about GoPro Mouth holder + Floaty

Here is what the manufacturer says about it: "The Mouthguard + Floaty is not a mouthguard. There is a risk of injury during contact activities. Floaty can support the mouthpiece, but not the additional weight of other GoPro accessories."

No, probably not, because the hero 9 is a lot bigger.

The floater does not fit the Hero 7, the mouth holder alone would fit and is also comfortable to wear in the mouth. As far as I know, the mouth holder without floater is available for the Hero 8.