You're talking about po-tay-toes and to-mah-toes.
The pelvis (which is what we're actually taking about when we say hips most of the time) is not going to change it you get on HRT as an adult. Some AMAB may have naturally wide pelvises (pelvi?), but what's there, in terms of bones, when you reach twenty something, is staying that way.
Fat distribution, on the other hand, can change, depending on your genetics.
Me, I'm stuck with a narrow pelvis and a small butt, no matter how many cups of estrogen I drink per day (but I'm working out to grow muscle mass there instead), but will probably get so much breast growth that I may even need a reduction.