Hm, good question! I have more bottom dysphoria (both with my junk and also with my hips) than top dysphoria, and I hate hate hate accentuating things with feminine underwear. Women's boyshort style is fine, but stuff with a girly pattern, skimpy cut, or god forbid, some material like silk or lace makes me feel like absolute garbage.
I used to wear a bra all the time and I had no issue with it. In fact, I think one of the reasons why I didn't realise I was trans until I was 19/20 was because I wore a firm fitting underwire bra all the time (even in my sleep) and that really minimised movement of my chest. Much easier to forget about! That said, these days, wearing a bra will make me feel worse than wearing women's underwear because ordinarily, I bind every day. I've gotten used to seeing myself without an obvious chest, and the whiplash feels awful!
So I'm not 100% sure how to answer, haha.