As someone that has a stutter, if someone wanted to start a conversation like that with me I’d personally be more open to speak about it and discuss some ‘improvements’ if the conversation starting with a question such as “when u started stuttering did u go to therapy?” “Where there things that made it easier for u to speak” ect, stuff like that (I think this would work for me personally because I’ll see it as the other person seems to genuinely be interested and wants to kind of understand me in a way idk). And then personally I think it’ll be easier to try slip in some techniques and improvements that you and her may think would be useful (joint discussing don’t just go throwing advice u think would help lmao). But if she doesn’t feel comfortable then don’t force the conversation and wait till she’s ready or something like that.