Cannot rename Magic Trackpad 2 in Catalina when connected via USB

System Preferences>Trackpad>Set Up Bluetooth Trackpad>{right_click on device} should show 3 options: Disconnect, Rename or Remove. It didn't, no matter how many times I tried. Just the one option to Remove the device from the list of recognized devices.

Same results with System Preferences>Bluetooth>{right_click on device} = Only the option to Remove.

Eventually, I tried unplugging the Magic Trackpad 2 from the USB cable that is used to pair it.

Finally the missing Disconnect and Rename options magically appeared.

I don't see this subtle requirement to disconnect the cable (but not disconnect Bluetooth) documented anywhere else, so I hope this helps someone.

It's too bad Apple doesn't recognize a problem with this undocumented user interface requirement. To me, the user interface would be more "just works"-y if you could rename the device when you're connected. Like, no need whatsoever to explain why you can't do something until you do something else.