Big boobs as a teen but nothing as an adult??

Okay so I have a question that google has not been able to answer which makes me feel like this only happened to me!

So as a teen (specifically 15-16) I had larger breasts for my body. I wasn’t overweight or even chubby really. I was active and healthy and my boobs were like a full B or on the small side of a C cup. Now, I was a young mother, I had my first at 17, followed by my second a few months before I turned 19. I attempted to breastfeed my first so I pumped for the first few weeks before we decided it wasn’t right for us. I used the depo shot for 6 months (so 2 shots) after my second. I dieted in my 20s and increased my exercise to get back to being healthy and I lost about 30 pounds (I was 190 something when I started and I got down to 150 before I decided it was time to rethink my exercise and gain back some muscle which added back about 10-ish pounds so I’m in my 160s now) Well fast forward to 22 years old and my boobs are barely an A. They’re nice but they’re SMALL! Which would be fine if I was a more petite person but I have broad shoulders and wide hips and NO CHEST. I use push-up bras. I eat whole fat dairy foods. I do push-ups for the allusion of a fuller chest (by increasing the pectoral muscles). I’ve tried the breast maxx supplements which I feel we’re a hoax because taking them as directed for 2 solid months made no difference whatsoever so I stopped taking them. Breast massage and stimulation had made no difference.

I know that using the manual breast pump and then losing 30-or-so pounds is probably where that went, by causing damage to the breast tissue and then by losing so much fat. But now I’ve got no idea what to do besides get breast implants (which would have to be in wayyy off in the future cause dang that’s expensive lol)

Anyone else have this issue? Anyone have any tips for increasing breast growth (besides gaining weight because I tried that previously and my stomach and butt got fat and I still had a flat chest so we stopped that 😂)? I know how to give the illusion of bigger boobs with push-up bras and the like and after extensive research I know there’s no surefire way to grow just your boobs but I’m wondering if anyone else has had this issue and if anything worked for you!