Introduction to Azure AD B2C for IT Pros

Wow thanks Sonia, I;ve been wondering about something like this for a long time. 
Only thing I can't see available here is Biometrics / Hello / Authenticator app for MFA or is that abstracted from the B2C layer and still sits with the federated provider?
Would be good for the conditional access to be aware that the federated provided user accounts is MFA compliant so there is not a double up on MFA.