Powercalc: lost in my own settings and configuration

I’ve setup PowerCalc once, ive added my Hue and Zigbee lights and I somehow managed to get them in a group sensor, which I added to my energy dashboard as Zigbee lighting power consumption.
I do see the sensor in my entities list but I have no idea what’s in it or how I can add items to it.

I also have a few virtual sensors added with power consumption, I want to add them also in a single sensor but I don’t know how.

To view the configurations of all sensors you have setup go to Devices&Services, find powercalc and click on it.

Will bring you to the integration page similarly as all other HA integrations.

Click Configure on the entry you want to edit. For example to add items to an existing group.

To add a new group sensor follow the docs:
https://docs.powercalc.nl/sensor-types/group/custom/