With Home Assistant, this is very easy.
Home Assistant comes with an MQTT client and an MQTT server and can receive all data from Homey. It is installed on a Raspi.
On Homey, only the apps MQTT Client and MQTT Hub are necessary. Enter the IP address and port of the server and it runs.
Imported Homey devices:
Result in Home Assistant:
Example HA Dashboard Energy:
Example HA Dashboard petrol prices:
The HA dashboards and Home Assistant itself can be called up with any browser.