Is dark underwear under light coloured pants A Thing now, or what?

I keep seeing teen and 20s women in light coloured pants or skirts with visible dark undies under them, like a black gstring under a white skirt, or even like dark bodyshaper underwear under a light dress. I'm sure I see it way more often lately than ever before.

I'm an elder millennial woman, I've lived through plenty of visible underwear trends, but this one seems odd to me. It doesn't seem to add much and I feel like it looks awkward.

So im curious - Zoomers, is this deliberate, like it's a thing now, or did these young women miss the memo about skin coloured underwear, or does just no one care about that anymore?