Cloudflare Tunnel for SIP/STUN traffic

I’d like to connect to my door intercom (doorbird) for audio traffic via a Cloudflare Tunnel. I set the public hostname up for HTTP traffic. And I can access the API totally fine. I cannot get any audio traffic over this tunnel. Do I have to change the service to anything else than HTTP?

If you need to use Cloudflare tunnels for anything other than HTTPS then you need to have cloudflared on the client. If you want to use anything that is UDP then you need to use private networking.