Regarding the admin MFA issue only phone support can help and ask them to escalate your issue to the data protection team. While phone call, press "1" as a business email user and press "1" again as technical support. You also need to provide your subscription purchased information such as company name, billing information, phone number etc. See: https://learn.microsoft.com/en-us/microsoft-365/admin/get-help-support?view=o365-worldwide#phone-support
Power BI Admin Portal asks for 6 Digit Authenticator code but App provides 8 Digit
I am using the microsoft authenticator app to try and log into my own admin account for a domain that I own in order to host a power bi visual.
I am asked for a 6 digit auth code but the app provides 8 digits. I wondered if it was due to my old device having the auth app on it and I didn't switch it over but nothing seems to be on the old phone and I tried installing it again but no dice so I don't believe that is the case. Each time I try to set up a work account (I believe my current one is set up as personal) - it asks me to input the auth app code in...while I am in the auth app. So I am not sure where to go from here. The other option is to scan a QR code but I don't know how I would get one of those.