What are the extra states about on Inara? Cold war, trade war, revolution, technological leap, historic event and colonisation - where are they coming from? They're not in the game.
More seriously, they appeared when the other new states got included, but ostensibly they got left on the cutting room floor. They're available in whatever api calls them, but aren't actually implemented.
There's other things like that in the game too that aren't just bgs states... different cargoes etc.
Some of them may well have been intended for use in Interstellar Initiatives - colonisation especially - rather than being something players could directly cause.