With the major caveat that I’m not a woman you could check out Vulpine. They came up in the UK cycling wave, went under, got taken over a couple of times, but did prioritise womenswear, and sponsored a pro women’s team. I’ve had a pair of their water-resistant trousers, and they’re solid. Anyway, ‘diamond gusset’: https://www.vulpine.cc/collections/womens-trousers-jeans
They also do padded undershorts, which are very good.