Doctors and researchers said they were not seeing evidence that Omicron was more threatening to children. Instead, much of the rise in pediatric admissions results from the sheer number of children who are becoming infected with both Delta and the more contagious Omicron variant, as well as low vaccination rates among children over 5.
https://www.nytimes.com/live/2021/12/29/world/omicron-covid-vaccine-tests#omicron-is-not-more-severe-for-children-despite-rising-hospitalizations
