If you had surgery, I’d get the paperwork just in case.Exactly my thought! But I’ve heard the flight physicals for pilot are more comprehensive.
More likely than not, you’ll mention you had knee surgery, flight doc will send you for an ortho consult with one of their own docs. They sign you off as having no problems since 17.
I know plenty of folks who came in with prior knee surgeries/injuries. Personally, i torn my ACL at age 10. No waiver.