Mqtt Statestream -> Mqtt Discovery

I have tried to get MQTT discovery to find the sensors posted by MQTT statestream but I think it lacks the config topic. It would be great if there was an easy way to transport sensors (or switches as sensors) from one HA to another HA easily. I use MQTT Statestream and manually configure the sensors I need in another HA. It would be great to have a automatic way of doing this.