Thread Two Nest Hub 2 auto, third and Pixel Tablet not

Hi There,

I have 3 Nest Hub 2 and a Pixel Tablet.

Two of the Nest Hub tablets where discovered automatically, The third however not.
I also don’t seem to get my Pixel Tablet as a Thread Border Router installed.

All devices are in a IOT network within a VLAN 66 and can access internet.


Because the tablet is on the first floor, I really want this device to act as a Border Router

How can I troubleshoot and add these devices?