SLZB set up with Thread via ESP Home

Configuration Matter/Thread
1

Hi There

Already have an SLZB running as my main Thread Antenna (via POE) and working well with a couple of Matter/Thread plugs on open thread border router

Ive added a second SLZB-06 but this time configured via their ESP32 firmware

My question is how do I add and set up that second thread SLZB in HA into my open thread border network so it can be added and work as thread network extender?.. I can see it and have set it up in ESP Home builder, but can’t see it as a device in Matter and it doesn’t pop up “to add” as a device

Thanks!