Hello @shleets
You should be able to see all of the devices – wired or wireless – that are connected to the network created by your primary/router Nest WiFi Pro unit. That unit should be the only thing directly connected to your outer internet service equipment – all wired devices should be connected to a switched Ethernet network that is rooted in the LAN Ethernet port on that primary Nest WiFi Pro unit (or connected to one of the secondary Nest WiFi Pro units). If you have multiple Ethernet ports on your internet service provider's equipment and have wired devices connected to those ports, then they are on a different ("outer") network from the ("inner") one created by Nest WiFi Pro.
