Creating an new 2F plugin requires to edit available2F / available2FSelfRegistration keys
I don't know if this is a real issue but at least technical documentation must be updated.
Currently I follow instructions from:
perldoc Lemonldap::NG::Portal::Main::SecondFactor
The 2F module is not loaded at all because available2F must be modified. I don't find it very convenient because the default value of this parameter will change when we will add a new core 2FA module in LL::NG.