No one has feminine legs when they are skinny enough - I've seen lots of photos of celebrity ciswomen with gangly adolescent legs. Maybe if you got down to a very low weight you'd burn the stored fat there, and testosterone will make you store more on your stomach.
That said, your hip structure will not change so if you also mean the angle (further apart at the top and then closer at the knee) then no, that will never change. The shape of your pelvis is permanent. Then again, the healthiest thing that anyone can do is to love and accept themselves even if they don't look how they want to look because we ALL have flaws and always will. That's why I'm detransitioning.