Ringing the doorbell sends a notification with a snapshot and a link that takes me to a tab in the dashboard with the advanced camera card. I can then use it to speak if I so desire, and I've also set up buttons on that page for the "quick reply" messages.
it's just that the resulting UI is terrible in my opinion (both due to home assistant itself being a bit cumbersome to boot, and because customizing the UI with things like card_mod is a terrible experience)
It’s a bummer you had to deal with TURN. Be nice if something was easier here.