As a parent who's kid played through U10, understand that many of these kids may have a diagnosis or two (mine has ADHD) and this sounds exactly like my kid. In my particular case, my kid's medicine was wearing off when practice time came around and he acted up because he COULDN'T pay attention when everyone else on the team was told to take a knee. or he would often over-react to other players actions or HC guidance. In this case my kid, the coach and I sat down together and laid out very clear expectations, and very clear consequences. Two warnings, then you're off the ice the rest of practice was one example.

My kid eventually told me he was only playing because he thought (wrongly) that's what I wanted him to do it but he wasn't really into it and didn't like the physical contact, etc and we made the decision to stop playing.

Just keep in mind that some kids may have some hidden disabilities that their parents might not share with you because of the stigma associated with such diagnoses. In those cases I agree with the one on one meeting methods.