Hello,
Thank you for reaching out to this forum. As a fellow Microsoft user, I'm here and ready to help you out today.
If you have used your personal account to join the Developer program, please try below options.
Try to use any alternate verification method like email. If you able to use email option, please try to disable MFA temporarily.
You will have option like "other ways to sign" or "I don't have access to my Microsoft Authenticator App"

- Go to the Security basics page and sign in with your Microsoft account.
https://account.microsoft.com/security
- Select More security options.
- Under Two-step verification, choose Set up two-step verification to turn it on, or choose Turn off two-step verification to turn it off.
- Follow the instructions.
For additional information please refer below link.
https://support.microsoft.com/account-billing/bf2505ca-cae5-c5b4-77d1-69d3343a5452
Hope this information would be useful to you. Please feel free to get back if you need any additional info.
Thank you!
Ravikumar
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