In my custom policy I used the example here: https://github.com/azure-ad-b2c/samples/tree/master/policies/totp
I have TOTP working, but I want to make sure I will be able to reset it if a user doesn't have access to their authenticator app anymore.
NOTE: This is NOT using Azure B2C's built-in flows where you can enable TOTP in the settings.
This seems like an Admin controlled operation. In which case
The B2C policy will then ask the user to re-enrol an authenticator device on next sign-in.