Zigbee sniffer

I want to retrieve the uid of one of my APS micro-inverters.
I have an APS ecu-b unit for monitoring my PVoutput.
One microinverter works ok, the other I cannot register because of missing uid.
Through sniffing and filtering the zigbee traffic I hope to find the micro-inverter uid.

Is there an app/sniffer for my homeypro which can filter the Zigbee traffic?

No, Homey doesn’t have such debugging tools, you need dedicated hardware. See this page for more info.