Kinda? I don't entirely know as I am not a shewomafemaleXXchromohomo, but I have noticed that younger women who are really into celebrities and things of that nature seem to prefer or indulge in "pretty boys" or men with feminine features, rounder features, etc.
I mean you look at the british invasion from the 1960s and all of those guys didn't look like John Wayne, Gregory Peck or Humphrey Bogart, they were very slim, very young, long shaggy hair, but at the same time often wore suit and ties and a lot of young women were obsessed with them, part of it might be because they are "big celebrities" in their specific field and not entirely the way they look, but I think it does factor in.
I mean look at One Direction and the bands like them from yesterdecade, or the K-Pop trend from a little more recently, I'm not sure what kind of actors or male celebrities women are into but I'd imagine there's probably a similar trend.
I know what I'm saying has almost nothing to do with "femboys" as a concept, even doe what I'm saying is kinda related, but also femboy shit is just propaganda and indoctrination into a degenerate online subculture and doesn't and SHOULDN'T exist in the real world thoughover.