I can definitely see the difference & your tummy has flattened up. There is some loss on your face and now it’s got sharpness. If you have lost 15 lbs and its not visible doesn’t mean that you are not losing weight. I suggest that you add some weight training in your work outs.
Look at yourself with kindness girl your beautiful! YES! I definitely can see a difference. You entire body as shrunk you can see it in your waist, your chest, your face, hips, and your neck! Your moving "inwards" if that makes sense, you look leaner and much more trim. Keep it up!
I agree with what others are saying about your face! It's tough to tell with your body, because you're wearing a sweater and because it's black, but you can definitely see a difference in your face. Great job!!!