I am not aware of anything in the GUI, but you can run the following command to see it from the CLI:
show ap port status ap-name <nameofAP>
You can also use bssid, ip-addr, ip6-addr, or wired-mac instead of ap-name
Sample Output:
AP "00:0b:86:cf:80:89" Port Status (updated every 60 seconds)
-------------------------------------------------------------
Port MAC Type Forward Mode Admin Oper Speed Duplex 802.3az PoE STP TX-Packets TX-Bytes RX-Packets RX-Bytes
---- --- ---- ------------ ----- ---- ----- ------ ------- --- --- ---------- -------- ---------- --------
0 00:0b:86:cf:80:89 GE N/A enabled up 1 Gb/s full N/A N/A N/A 14602 2604693 49887 5566678