Myocarditis is a pretty serious thing [1], so even a slight increase in risk in young people makes it pretty much a no-no to vaccinate them.
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9888677/#:~:tex....
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9888677/#:~:tex....
https://newsroom.heart.org/news/myocarditis-risk-significant...
Still lower in the end.
Personally, I'd like that explained to me before the shot.
Children also get much higher myocarditis rates from COVID than without COVID.