The sad statistics of how armed conflict affected children in 2020 were published in a recent report by the United Nations.
The recruitment and use of 8,521 children (as soldiers), the killing (2,674) and maiming (5,748) of 8,422 children and 4,156 incidents of denial of humanitarian access’ are part of the Annual Report to the Secretary General on Children and Armed Conflict.  You can read the full report here.

Newly released child soldiers wait in line for their registration during the release ceremony in Yambio, South Sudan, on February 7, 2018.