Sounds like the perfect thing to make HASS the centre of all home automation. Who knows - this could even get published as an official Google Assistant partner app. That would be an awesome moment for HASS imho.
That sounds awesome!! Hopefully, HA will eventually also have some sort of reverse proxy function so this can become a proper Google Smart Home app. I am guessing the first few iterations will require users setting up individual projects in test mode.
I finnaly made it works to the final step when I try to add my teste app, try to reach mydomain.duckdns.org:8123 and gives me conection time out anyone could help me?