Is it possible to have a separate URI for each step of the MFA in B2C? Right now as a work around, we are keying off the ajax Success return to provide a unique user experience for each step but it might be cleaner if we don't have to rely on this.
According to the documentation, we should be able to extend the phonefactor technical profiles, but there aren't any details about this specifically.
Update
The MFA behaviour (for a custom policy, this is implemented by the PhoneFactorProtocolProvider
provider) is built to be self-contained that means the call/text interaction can't be separated from the verify interaction.