Best excersize for boobs

Jo

Can anyone recommend the best excersize to lift my boobs? Currently doing 1 hour walking a day pelvic floor 3x per day 20 mins box VR and mum pouch excersize once in the morning and once at night have gone from 17 st12 to 13 st 4 over a few months also doing calorie deficit but the skin on my face has dropped and looks baggy I've no idea what I can do to help this it's really getting me down 😞