Miscellaneous topics that do not fit into specific categories.
Hi. I'm Brian and I'll try to help.
Are you using a personal Microsoft 365 account or an institutional account? If the former, you've pretty much out of luck. Without access to the authenticator or a second way to receive the one-time password, you won't be able to recover the account. Even if you were to connect with Microsoft support, they cannot clear two-factor authentication from the account so you can start over. It is imperative that you never lose access to the authenticator or you lose the account. That's the whole point to using an authenticator.