@wifiexpert you do realize you're on Page 5 of answers and your solution was already presented in the thread??? Your screenshots are helpful never the less :)

@BartekJ Only clients served by OC-200 DHCP will show in the "Clients" list. It's not intended as a Network-Sniffer for unassigned clients with Static IPs. My Netgear Managed Switch doesn't show in...

Then it's most likely not supported ... You would have to look it up on TP-Link Website

@BartekJ Just make sure you use the Web-Interface via Omada-Cloud interface As far as I know, it's not possible on the UI of the Router itself.

@BartekJ Let's try this again, with a more highlighted image

@BartekJ Well... it works for my OC-200... I don't know what device you are looking at?