Created an account. It asks for and confirms email and phone number. Interestingly it does not ask for name or SSN. So it doesn't really represent an identity as a person but rather as a recipient of communications.

Security-wise, starts with using the phone for 2fa, allows setting up TOTP. Generates backup codes and tests for retention. Big problem though: there's no option to disable the phone as a 2fa option. A lesser sin is no U2F support.