It seems that a firmware upgrade could solve the problem with the displayed consumption, see here: [Device Support Request] IKEA inspelning power monitoring smart plug · Issue #3374 · zigpy/zha-device-handlers · GitHub
How did you manage to add it as a device in homey? I have a Homey Pro (2016-2019) but I haven’t been able to add it, not even with the universal zigbee button.
