Alright where do I start?
A Moc can be a female Moc without having Nuva boobs and rounded hips, so you don’t need to go for the overly prominent features like this.
That said if the goal of the Moc is to have said prominent features then I’ll suggest some tips.
The chest and hips you made can easily end up being too large for a figure this sized, I like to have very minor hourglass shapes on my female Mocs, so I’ll give tips to my style, have one Nuva shoulder as a chest and flip the Uniter piece to cover the back, this might be a little hard to.
The waist is really thin compared to the shoulders and waist, the hand hips on a female Moc is actually something I’ve done before, but it’s the shoulder armor that makes it much more of a problem, you could rework them onto the sides of the upper legs to curve into the hip, or you could simply get rid of them altogether.
If you reduce the hip size to match the waist a little more to make a thin Moc, then you also have to do so with the shoulders, having the ball joints 3 spaces apart from eachother (like the hips of a hero factory torso) works for me, heck even just having a bare Uniter piece as a torso could be good enough.
These are common mistakes a lot of people make when trying to make “female mocs”
And you mentioned earlier that none of the masks you have look feminine, masks are pretty gender neutral, just use a mask that you like and is silver.