nx os – Is the cable-diagnostic tdr feature available on Cisco Nexus switches?

I have a Cisco Nexus 93180 on NX-OS version 9.3.11. I noticed that an available command is “show interface eth1/X cable-diagnostic-tdr”. However, when I issue the command I get an messages that says, “Time Domain Reflectometry(TDR) applies only to copper ports”.

Firstly, the interface I’m issuing this command against is indeed a copper port. …well, at least it’s a copper SFP.

Upon researching the feature using trusty google, all I’m seeing is tutorials on how to use it with catalyst switches. They state that I should run the “test cable-diagnotics” command. My switch doesn’t have a subcommand for “cable-diagnostics” when I enter test.

Any clarification would be great.