Account Compromised.... Authenticator Passwords

Question

Hello,

I learned this morning that someone successfully signed into my Microsoft Account via Microsoft Edge on a Windows. That is all I know in terms of what they have attempted to do.

I do not know if they accessed my Authenticator account (I did not receive any requests for that, or for anything other sites or apps). However, I'm concerned because my Authenticator app showed a list of 70+ passwords I had saved, and I wonder if they were able to access them, which is a far greater security threat.

I have since reset my passwords, updated MFA for my Microsoft, emails, and banks, but I still wonder if those 70+ passwords were compromised.

Would anyone be able to assist me with understanding what they may have had access to by accessing my Microsoft account? I tried calling in and there was no ability to reach a human.

Thanks!