If I search for "label pane" in the Command Search, I don't see anything obvious that would open the label pane.

I realize that opening the label pane is easy enough. The label pane can be opened from the Contents right-click menu. There are likely other ways, too, including opening the label pane indirectly from the Label ribbon tab, or even indirectly from the Command Seach.
But the point is, in a pinch, it would be easiest if say, the first result in the Command Search was "Label Pane".
It's quite possible that I'm missing something. It's been a while since I've used Pro.