MQTT data extraction issue with shelly 2pm g3

[erniepb]

Hey everyone,

I have the following issue with my Shelly 2pm g3. I have configured mqtt2prometheus with the following

mqtt:
  server: tcp://127.0.0.1:1883
  user: USERNAME
  password: PASSWORD
  client_id: mqtt2prometheusExporter-shelly
  topic_path: shellies/+/status/+
  device_id_regex: "shellies/.*/status/(?P<deviceid>.*)"
  qos: 0
cache:
 timeout: 24h
 state_directory: "/var/lib/mqtt2prometheus"

metrics:
  - prom_name: meters_electricity_consumption_kwh_total
    mqtt_name: "aenergy.total"
    help: "Total consumed energy in Kilowatt-hours"
    type: counter
  - prom_name: meters_electricity_production_kwh_total
    mqtt_name: "ret_aenergy.total"
    help: "Total consumed energy in Kilowatt-hours"
    type: counter

And this is what is delivered as metrics:

# HELP meters_electricity_consumption_kwh_total Total consumed energy in Kilowatt-hours
# TYPE meters_electricity_consumption_kwh_total counter
meters_electricity_consumption_kwh_total{sensor="switch:0",topic="shellies/shelly2pmg3-balcony/status/switch:0"} 14506.001 1770022860084
meters_electricity_consumption_kwh_total{sensor="switch:1",topic="shellies/shelly2pmg3-balcony/status/switch:1"} 258099.939 1770022860111
# HELP meters_electricity_production_kwh_total Total consumed energy in Kilowatt-hours
# TYPE meters_electricity_production_kwh_total counter
meters_electricity_production_kwh_total{sensor="switch:0",topic="shellies/shelly2pmg3-balcony/status/switch:0"} 0 1770022860084
meters_electricity_production_kwh_total{sensor="switch:1",topic="shellies/shelly2pmg3-balcony/status/switch:1"} 258024.916 1770022860112
# HELP mqtt2prometheus_connected Whether the mqtt2prometheus exporter is connected to the broker
# TYPE mqtt2prometheus_connected gauge
mqtt2prometheus_connected 1
# HELP mqtt2prometheus_received_messages_total Total number of messages received per topic and status
# TYPE mqtt2prometheus_received_messages_total counter
mqtt2prometheus_received_messages_total{status="success",topic="shellies/shelly2pmg3-balcony/status/switch:0"} 5
mqtt2prometheus_received_messages_total{status="success",topic="shellies/shelly2pmg3-balcony/status/switch:1"} 140

So, technically it is working as expected, but I would really like to have sensor as a composition of e.g. shelly2pmg3-balcony and switch:0 to e.g. shelly2pmg3-balcony:0. Is there already a way extract multiple strings from a topic to manually compose the sensor name?
Help would be greatly appreciated 😄