Hormones work differently for everyone. Some work faster, some slower. The muscles will become less. Exactly where is not written down anywhere. Your wishes are valid, but because we were born with a male body, we have to put up with many things. In your case, perhaps too many abdominal muscles. Whether they ever disappear... who knows. What helps, of course, is less exercise and eating less healthily. Afterwards, your belly will look completely different. OK, all joking aside. I'm rather envious of how sporty you are. I'd say wait a while longer. The hormones will continue to help you.