"Almost one-third of all new cases in Immigration Court are juveniles. Case-by-case Immigration Court records updated through February 2022 indicate that the Department of Homeland Security (DHS) issued 310,359 Notices to Appear (NTA) so far during fiscal year 2022 (October 2021-February 2022). Where age [2] is recorded, 81,080 or 31 percent of these immigrants were from 0 to 17 years of age at the time DHS issued the NTA."

https://trac.syr.edu/immigration/reports/681/