Not seeing an issue. The folds in her skin show up more than on normal-pattern BPs- & they're every bit as serious as the folds in your hands & elbows.
She could probably gain a bit of weight, but it's nothing to worry about.
I kind of figured the needing to gain some weight. I'm sure petco wasn't feeding her properly so I've been offering her a mouse on Saturdays and a pinkie on Tuesdays to try and get her to gain some weight