There are definitely trans kids getting surgeries, it's just in the hundreds value rather than thousands. 238 in 2019, 256 in 2020, and 282 in 2021 had top surgery.

https://www.reuters.com/investigates/special-report/usa-transyouth-data/

Between 2000 and 2005, 72% of gender confirmation surgeries were bottom surgeries; from 2006 to 2011, that number increased to 84%. And the number of patients insured by Medicare or Medicaid seeking these procedures increased threefold between 2012-2013 and 2014.

https://journalistsresource.org/politics-and-government/gender-confirmation-surgery-transgender-youth-research/

The stats exist, people just don't care enough to look for them.