isn't that the author's art style tho? How would you do it then? keep redrawing the same exact thing? genuinely curious.
Being lazy isn't "an art style" tbh. A LOT of artists are using that to not draw proper vulva in general.
And: The varied penises are clearly inspired by animals and similar. As well as slight demonic touches. So: Just do that. Horse looking penis? Horse looking vulva. Pointy clit. Different colors. If people can find a way to draw 50 penis variants, they sure can find a way to draw at least 5 vulvae.