Hi!
Can you still log into http://portal.office.com/ ?
If you cannot because of the authenticator issue, you could consider checking with your IT department whether they could reset your MFA.
Additionally you may check the MFA settings (if you can login) using the article here https://support.microsoft.com/en-us/account-billing/change-your-two-step-verification-method-and-settings-c801d5ad-e0fc-4711-94d5-33ad5d4630f7
Hope this helps
----------
If it helps, please accept the answer and upvote