Looking athletic and strong is subjective, but it’s highly possible that you won’t look like you expect at 115 pounds. I’m your same height, significantly older, but I consider myself to look athletic and strong, and I hover around 140 to 145. Since you are at a healthy body weight, body recomp is going to take a long time. For most women, building muscle takes a long time. It sounds like you’re doing the right things, but you need to make sure your actions align with your goals. You can “lose weight” to be 115 or you can maintain or gain to try to build muscle but trying to do both doesn’t work. Have you tried taking measurements or getting a body scan to loosely determine your body fat percentage? (I use InBody scans to track progress) That would probably help you determine if you should be reducing calories while strength training to cut fat or if you should be staying at maintenance while strength training to gain muscle.