So I totally changed my react from angry (at the diss on old people) to laugh (at the wannabe man). Of course the nice old lady correctly sexed you (and was in passing too polite to mention your embarrassing facial hair): she’s a nice old lady.
Discussion
My favourite comment is the one saying that getting misgendered several times per week doesn't mean that you don't pass!
Nice old lady should've said nothing and let the syruppy-handed TIF get followed around by wasps.