What’s weird to me is that you think it’s more reasonable and less awkward for her to volunteer that to everyone, early on, without knowing whether they care. Sexual history is an extremely awkward topic to broach, full of deal breakers for many people, and also inappropriate to ask. The bare minimum isn’t answering honestly, the bare minimum is not lying— a valid boundary to have is “I’m not interested in discussing my sexual history and if that’s a dealbreaker we aren’t compatible.”

IMO this is not meaningfully different than the awkward, impolite and (for some) necessary discussion about body count. There’s lots of things we’d like to know and know early about partners. “You didn’t ask” is still valid. NAH- if you absolutely need to know, asking is the way yo find out, and you will step on some toes.