In this explainer, you can find how to lookup your connected antennas end devices onto the wifi connection
In the connected antennas tab, you can find all connected antennas,
In a normal setup, you will only see the router itself,
Only if you have expansion antennas you will see more entries.
In the connected devices tab, you will see all connected devices to your wifi.
The first part is your Wifi interface your device is connecting to, the Wifi name and the Wifi MAC address of your device.
The second part is some additional info, here the most important is the RX Signal value
here you can see a chart of what these signal strengths mean.
The smaller the number the better.