In Western data sets, like in the U.S. and UK, the most common body shape in cis women (regardless of race) is the rectangle body shape (46%), compared to the pear body shape (20%), apple body shape (14%), inverted triangle (12%) and hourglass (8%).
Sources: https://www.mmu.ac.uk/news-and-events/news/story/mmu-research-reveals-clothes-sizing-confusion
https://www.discoverfashions.com/blog/all-body-shapes
The reason trans women start off as "bricky" is because testosterone increases muscle mass in the core and obliques (sides of the abdomen) giving that straight up and down shape, even in cis men with a low body fat percentage. 5-10 years on estrogen will fix the muscle mass issue and eating more will help with estrogenised fat distribution.
Obviously, cis female rectangle bodies don't look the same as cis male rectangle bodies because their waists are still defined, they're just not "snatched" like an hourglass.
I'll leave a drawing I made in the replies to demonstrate what I mean. ⤵️
Edit: Your results may vary. Rectangle bodies have high to moderate WHRs from the bone structure itself, which is why rectangle bodies don't become hourglasses with less body fat. However, the waist can become slightly tapered with weight loss and muscle mass reduction. :D