so glad you brought up this important topic. Chafing is a real problem, and probably is not gettging solved because its hard to talk about. There are a number factors involved in really solving this problem, and depending on your anatomy and riding style. So here goes ......
As far as I can tell, this is more pf a problem for women who are bony on the pelvic floor, do not have a lot of labia majora fleshiness, or who whose labia minora or clitoris are not smallish and tucked away. If you have all 3 of these ts a tough problem.
This can be compounded by the seat: you can spend lots of $ on seats, and women specific seats are often not the answer since they are focused on hip width but not on the width of the pelvic floor where the "tender bits" sit. Usually a cut out or indentation helps as of course does the "right" amount of seat padding specific to you.
Shorts are a factor, padding is needed but too much is about as bad as too little in that it can bunch up and pinch (womens' shorts often have one gigunda bunchy pad whereas the better men's shorts will have some channels in the padding that might work better for you). Again whatever worked for you works for you...recommend not worrying about the "gender" of clothing: be confident you are a REAL WOMAN no matter how some piece of fabric is cut!
Bicycle fit (including a) seat fore-to-aft placement, length of top tube / stem, and b) the reach to the handle bars, as well as c) height from shoulder to the handlebars are factors.
Today's cycling wisdom has drop bars placed lower than in the past when the top of the stem was considered a good height if it aligned with top of the seat nose. This is more of an issue for women than men becaseu even with equivalent torso length , on average women's arms will be proportionally shorter than men's. This has to be solved at the head tube and steerer lengths which is what give the vertical rise to how high teh handlebar stem can be attached. If your bars are too low to reach when you shift into a more upright position, some women will always be forward on the pelvic floor than back on the "sits" bones.
BTW, this is made infruriating to fix because steerers are cut short at the factory and with today's threadless headsets cannot be simply adjusted up as they were with earlier technologies. Make sure to look at these factors when bike shopping. Caveat emptor: stem with more rise may or may not help the problem. (They also tend to be clunkier and heavier)
Anti-chafing creams can help as well, although many are water-based and some folks find this means it just gets absorbed by the shorts. Vaseline is goopy but another option. It get's in the shorts too, but a lot more stays on the skin.
So to some extent chafing is a symptom and fixing any the root problems of position fit and saddle fit are key. These still might not make it completely go away, even when combined with the right padded shorts for your anatomy, so lube to protest the fragile tissues may still be important too.
I suppose the increasingly common labiaplasty (yes again even in this "enlightened" era, our culture forgets normal women come in all shapes and configuration and do not look like air-brushed women in "those" magazines!) is another option for those who hang out a tad more, but gee who wants to go through that!