Hi Purplebttrfly36-2714, I want to help you with this question.
If I understand you correctly, you authenticator app only shows a 8-digit code and not the Microsoft required 6 digit code.
Please try to add an additional login method in the account setting (https://mysignins.microsoft.com/security-info):
Add the authenticator app as a verification method again, go through the steps, and check if the app will show the required 6-digit codes.
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