I spent a day to get a secure and local connection from Home Assistant to my Cerbo via MQTT. This is according to many entries here almost impossible or unstable or not future proof.
I do not know why Cerbos want to be the broker only, they are not the center of the universe. Have an option to be the client and done!
These days local AND secure connections are needed more than ever. Especially for devices which potentially smoke my house.