Is this a new tag?

Yes

if this ever got paired with the communism tag it would make for a peak manga

Probably all NicoMaki works should have this tag

I made a few suggestions for this which got accepted, based mainly on what had recent updates. I haven't felt like really trawling for stuff to add, but for someone who does I think that Villainess and Maid would have a lot of overlap with this tag.