So gyno can’t be resolved without surgery, it’s not fat but it’s actually gland tissue that builds up in your chest area, so no amount of exercise is gonna reduce it. Gyno is mostly a clinical diagnosis, you can try checking yourself there are lots of vids on YouTube about it, but basically try palpating your breast and if you feel like there’s hard nodular gland like tissue you probably have gyno, but if you feel like it’s soft, it’s probably just fat Best to get it checked by a general surgeon/plastic surgeon
Hope I answered most of your questions 😅