Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Dear Eduardo,
Thank you for visiting the Microsoft Community.
We've noticed that you seem to be having trouble with the Authenticator. I wish I could solve your problem, but it is more suitable to publish on Microsoft Learn Authenticator, more users post these problems there, you can click on "Ask a question", there are experts who may provide more professional solutions in that place.
Here's a link: <Microsoft Authenticator - Microsoft Q&A> to the forum where you can raise specific scenarios and share your idea to solve the problem.
I sincerely hope that your query is handled appropriately after you have contacted the appropriate department. Thank you for your understanding!
Also, here is some information that may be useful.
Common problems with two-step verification for a work or school account - Microsoft Support
Best regards,Ian - MSFT | Microsoft Community Support Specialist