If I guess, the question is:
"where did the very-very-very old face edit commands from Unigraphics go in newer of versions of NX ?"
Somewhere along the timeline they were most probably replaced by the so called "direct modeling" toolset, you should find features which can do the same and more.
Regards,
Tomas
Never try to teach a pig to sing. I wastes your time and it annoys the pig.