They did not have BBCOR back in my day so I'll relay what my son has used. A few years ago in 7th grade he swung a 32" Rawlings Velo. He hit it well, but he never really liked the bat and was always trying other bats. The way he was hitting it I thought it was a great bat. His teammates loved it.
He didn't play 8th grade ball this year because of COVID, but he's preparing for freshman ball now and I just ordered him a Marucci CAT8 Connect Black. Back in travel ball he hit a CAT7 USSSA bat and loved it so I'm hoping he's happy with the CAT8 he finds under the Christmas tree this year.