Which requires them to explicitly ask your age outside the bounds of qualification for a job (over 18 etc). Which ends up opening them to age discrimination lawsuits.
Also, they could just ask for your SAT score and any relevant info (if you took it during COVID from your car, etc.) and then you could disclose whatever context you wanted.
People are biased 25 vs. 55 not 33 vs. 34.
Unfortunately, there isn't really a viable way to prevent employers from finding out your age from your resume/CV.