That's not a "Natural Curls" style, that's a "Wavy Bob" at most.
There are two hairstyles that SQEX categorically refuses to get in the game: very long hair (at least past shoulder blades) with front bangs (every long hair has no bangs) and very curly hair/afro.
And I seriously doubt it's an actual game limitation, more like the unwillingness to do so. So we'll get the umpteenth variation of short to medium hair with slightly different bangs varying from straight to very vaguely wavy. If they feel "creative" they'll have a little braid on one side, or a small ponytail.
They could also make a lot of good things by splitting the hair choices between front bangs and back, giving people the chance to mix and match different styles.
But they don't.
And then wonder why there are so many of those things that start with an M and end with odds without one D.