Where I live it isn't illegal for people assigned female at birth to go topless in public. In fact, it's not even technically illegal to be naked in public as long as there is no sexual intent to it.
That said, I don't go topless in public because I've not had top surgery yet, and because I have a lot of dysphoria around my chest. But just because I have dysphoria, does not mean that I feel entitled to go ->-bleeped-<-ting on other people's parade. That's a bit selfish, imo. I fully support everyone being able to be topless in public if they choose to, even if I don't feel comfortable going topless without surgery, or even if I find topless people triggering as far as my own dysphoria (which I'm fairly certain will go away once I've got top surgery). I fully intend on being one of those topless individuals the minute I have surgery. We need less prohibitive laws as far as body-positivity, not more prohibition. The human body isn't something to be ashamed of. I might not want to walk around naked myself, but if other people want to, more power to them.