Someone needs to tell this librarian Google has 2FA backup codes you can just write on a piece of paper.
This side steps the issue that often these are scenarios where the patron is already locked out of their account and coming into a library as a last resort - so lecturing them on backup codes will be of no avail.
As of my most recent attempt, the OTP flow still mandates input of a phone number. Those who lack phones cannot request OTP.
So, no, nobody has printouts of backup codes except the people who are already aware of Google's reliability problem.
I'm starting to wonder if she's the smarter one.