'Narrow hips are a transwomen exclusive trait'
Nope. Okay fine, genetic female pelvises differ from genetic male pelvises, but there are plenty of narrow hipped, non-hourglassed natal girls out there. When I was going through my 'do anything to escape my notorious school pariah status' phase, I copied the looks and dress of the girls. I was downright jealous of the sexy 'lots of junk in the trunk' girls. I bought the tightest jeans I could find, I ate Krispy Kreme donuts out of business - still no junk in the trunk!
So don't stress over it. If your trunk is empty, you're in good company.