I think I didn't express it clearly enough.
When the form form for the validation code, the one where the code from a validator app is entered, it would be useful to have an event on the server that can be used so the developer can calculate and email the required code to the user.
Although the authenticator apps are the preferred method for retrieving a code some clients want a code sent by email or sms (I am still amazed that the banks use this method, but that's people for you).