I think the complaint is that male Rider designs tend to prioritize looking cool, whereas the female Rider designs tend to prioritize looking stereotypically feminine over looking cool.

Kamen Rider Femme looks cool and in keeping with the show's other designs, but it's undercut by her name being "Kamen Rider Hey-Look-I'm-a-Girl!" (I'm hoping that there's some Japanese wordplay there that makes it cleverer than it seems.) The female movie Riders also have the drawback of being quickly forgotten and generally not "counting" because so many movies are alternate-world stories. With that said, there've certainly been female Kamen Rider designs I've liked. Sadly, most of them have been short-lived.

That this is a unique suit is pretty cool. Given that it's Poppy, I can't really complain about the stereotypical-cute-girl theme.

To me, it looks like it's just lower down on the helmet.

Maybe I was just thinking of Nadeshiko as a character. Point is, virtually every female Kamen Rider has been identified by their gender first and foremost. Hell, Femme's name was, well, Femme.

Plus holy shit yeah, we've only had four exclusively female riders counting this one. Two of them pink. That's pretty sad.

EDIT: Or, yeah, what Tokumonkey said.

Given Kamen Rider and Sentai are primarily aimed at a male audience, it makes sense unfortunately.

Only so many unique female riders in one franchise. Only one canon female red ranger in the other.

Not really. She was some space jam. We never met the real Nadeshiko, who was actually a school girl.

Poppy is bubble-gummy though, so at least her personality was established as such before hand.

Not siding with or against it, but did you expect her rider form of all people's to be edgy or something?

You're forgetting L'Arc, but I don't think anybody would blame you for that.

Well we did see her for a second at the end of the movie, but she had no lines and did nothing of note except (reasonably) blow off Gentaro.

If you want to get really technical, we have twelve if you judge by having a somewhat unique name and some obscure Hibiki Riders.
Femme, Larc, Shuki, Amaki, Fubuki, Kivala, Nadeshiko, Marika, Idunn, Necrom Y, Necrom P, and Poppy. Jam also had a female body canonically, but eh.

A lot of those are reusing male suits, though, and SPLIT LIP is talking about exclusively female Riders (and Shuki doesn't count because she's garbage).

It's actually better than I thought it would turn out.