You try to pair it using the method described, and it doesn’t show up? Perhaps the “generic” Zigbee implementation of Homey assumes at least some Zigbee clusters (like OnOff) are present before accepting a device as a generic Zigbee device.
In that case, you’re out of luck and you need to use supported devices, like the IKEA repeater.
I managed to connect them now (i have 2) they work like a charm. bought 2 cheap 3,3v Power supplies - put them into a box…
The thing is to flash them with the right Router Firmware - and then connect them to the Network as a “Homey” zigbee device.
It appears that homey does not give a feedback when the device is added and adopted to the network.
but using the developer app - i can see the routers and query them. also they are chained the way they should be. I am now transmitting Zigbee 100m away from my house.