We have a team that is tasked to this. They are taking a female-inclusive approach. I'm not real sure what that means, but they are not looking at female-specific vests. We don't have female-specific rucksacks either.
In a female frame, the shoulders are narrower than a males, so their straps should be narrower. Right now the rucksacks that we have available are designed for a male frame, so they will sit wider. Imagine having to wear 80 pounds on your back in a position that isn't ideal for you. It pushes your head forward, so you get additional stress on your cervical spine.
Then you have the ballistic vest, which is not designed to accommodate breasts. Usually it doesn't fit. They'll only have mediums when you're an extra small, but you're a “small target”—a quote that actually came from what was told to one of my friends. She was on deployment in an active combat zone, and they didn't have ballistic plates for her that fit. She was told, “It's a good thing you're a small target.”