General

Good news is you can get them removed or reduced.

I'm not nonbinary, but I'm a trans guy with chest dysphoria so one day I would love to get top surgery. I need to save up a bunch of money though. I like seeing my ass grow, but I'm more content with seeing my belly grow a little bit more.

Yep, absolutely relate. And yeah, can't afford a removal (regular reduction really only works in a specific range, and radical reduction isn't done by many surgeons.) I haven't worn a normal bra or measured in years at this point but I know the last bra I bought was a 40H and.... just don't wanna think about that.
It's also one of the reasons I haven't bothered trying to gain a ton more even though I want to be bigger. Just can't handle the tits growing more, especially since they're already so big.

First let me preface this with the fact that I am female and identify as such. I love my body how it is. I work out a lot. I feel better when I do. I am a 32E. I don’t wear bras because they tend to put a lot of pressure on the lymph nodes and just I end up panicking when I have to wear them. My point is that the way I avoid back pain and other issues is by doing specific exercises. If you work all the muscles that support you breasts it will help. Obviously it probably won’t shrink them but it will set up a foundation of support. I know people on here are interested in gaining. But you can still gain and work out just the chest and back. And if you do cardio it may take weight from your chest. It depends on how and where you gain. Also maybe it’s what you are eating that contributes to more weight to go to your chest. Also a lot of the food in America has stuff in it that causes weight gain in strange ways. So maybe look into that? I don’t know. Just I know that for me I can’t eat a lot of over processed stuff because it makes me sick and anxious. I also can’t handle dairy anymore. The dairy thing is rather recent. So it might be something in the food. Maybe you might be able to do some research and then you can still gain weight in a way closer to what you want. I just know that for some people certain foods cause certain gains and certain exercises cause certain changes in their body. Maybe you can ask an Instagram person? I know that my friends sister in law is a naturopathic doctor specializing in woman’s health and hormonal stuff. Maybe ask someone like that? But I guess they would have to also advise you to do healthy stuff in general due to the oath they took as a doctor. I don’t know I hope some of this helps.