Surgery isn't the only thing that can give you perky breasts. Exercise can help fight against gravity, and aesthetic hacks like tape are great when.
For many women, having perky breasts is a priority. If, however, you want to try for firmer breasts, you can do different exercises to strengthen your pectoralis muscles. This is not guaranteed to make your breasts perkier, but it will give you a more toned chest, and that may.
Real talk: There's not a workout on earth that will lift your breasts. That's mostly because exercise only works your muscles, not your sagging.