Not true. Delta is showing increasingly worse numbers for younger people. Some children's hospitals are full from it. If you have another argument besides that one let's discuss.
"The study does note that “it appears that severe illness due to COVID-19 is uncommon among children.”
"Among the 23 states and New York City reviewed by AAP, children’s hospitalizations made up 1.3 – 3.5 percent of all COVID-19 hospitalizations for the week ending July 29."
"According to the study, children were 0.00 – 0.26 percent of all COVID-19 deaths, and seven states reported zero child deaths among data from 43 states, New York City, Puerto Rico and Guam, with 0.00 – 0.03 percent of all child COVID-19 cases resulted in death in those areas."
If you're trying to provide evidence that Covid does not present a serious threat to children, it'd be hard to do a better job.