Nanoleaf homekit only bulb

Hi,

I have a couple of Nanoleaf homekit only bulbs which are working perfectly when added to Apple Home, but with this automations through Homeassistant is limited and not very stable, so I decided to give a try and add these to Homeassistant thorugh
HomeKit Device - Home Assistant (home-assistant.io)

I followed the documentation of the integration (added to Apple Home, removed but kept powered on) but HA does not discover this device, neither the suggesten python module does

(venv) ~ # python3 -m netdisco
Discovered devices:
Discovered 0 devices

I wonder if there is something wrong in my environment, so it cannot be seen. In the past I had my own Linux server with unbound DNS, some bonjour implementation and so on, so I wonder it can be some DNS / mDNS magic?

Thank you
L: