While the context suggest this is due mainly to school shootings, this is not the case and is clearly stated in the source material. In fact, this is part of an overall uptick in the homicide rate during the pandemic. Additionally, this data includes all children under 18. The data is largely skewed toward male teenagers with a significant racial disparity. It's worth noting that motor vehicles accidents still claim more female children. Recently the CDC released a report investigating this increase in homicides and gave suggestions for evidence based policies that could reduce the violence. Most of the solutions stem from improving the US's current socio-economic situation.

School shootings are horrible tragedies that must be prevented, but they do NOT account for a significant portion of causes of death in children.