Do NOT use Google Authenticator unless every account you use it for has an alternate MFA option (backup codes, etc) that you've confirmed work. It does not sync

Do NOT use Google Authenticator unless every account you use it for has an alternate MFA option (backup codes, etc) that you've confirmed work. It does not sync to your Google account and there is no way to back it up (even manually). The moment your phone gets stolen, breaks or dropped in a river, you will learn a very quick lesson about MFA backups/alternates.