@sudoaptgetlife @homeassistant I used the HomeKit integration in HA, which I used to pair the Hive hub using its HomeKit pairing code, which in turn gives me a Bridge device (the Hive hub), and then a device below that that's the Hive room stat.
I also have automations running using the temps from the Hive stat, and others that control the Hive system when other thermometers hit certain thresholds (eg turning on the heating if the pipes in the kitchen or garage are at risk of freezing, using the temperature sensor on Shelly Flood devices).