2 way audio function Unifi G4 doorbell

I’m using the Unifi Protect integration and it works well. Only thing that annoys me is the fact that the 2 way function for the G4 doorbell isn’t available in my configuration. Is this a missing feature or a setting issue?

Duplicate Two-Way Audio (e.g. for doorbell, intercom, camera-systems, baby-monitors, sip, ...)