The presumption is that for someone without a hyper-connected Silicon Valley social network, someone here currently probably works for Meta, could get in touch with them to verify their claim, and possibly help them submit an Oops. Many megacorps don't have any sort of official approachable support path and DGAF about individual users.

My (former) personal account was instabanned twice for simply browsing the 2FA page during the Meta hiring process. It turned out I had a zombie FB account that I'd prefer to have obliterated because I didn't have access to the email it was associated with any longer, e.g., @stanford.edu, and that was tripping the "one FB account per human" rule.