Command _ViewportProperties doesn't work

As for title.
Thank you

If I recall correctly, this command was removed because it is redundant - all the info and options are available in the Properties box when a viewport is active and nothing is selected.

–Mitch

I think you’re correct. And since that’s the case, I suggest that the command be removed from the Viewport menu. I have a feeling folks will try to use it out of habit, so it’s better to remove it. My two cents.