I'll leave the question of data searching to others more knowledgeable; it's probably harder and harder to hide information in the information age, but if you can do it...
However, physically, I've been examined by a gynecologist and ER doctors who couldn't tell my parts weren't factory-made. My vagina and vulva look and function like a cis woman's. (Obviously I'm lacking a uterus and ovaries, but the explanation for that could also cover why I was on HRT - a full hysterectomy with ovary removal. At this point, menopausal HRT wouldn't out you either; there are cis women who end up in menopause young and due to surgery.) So yes, with a sufficiently skilled surgeon, you probably could avoid having to admit anything even when naked.
And all physical gender traits, aside from genitals, occur in both genders; it might be more common for men than women to have larger hands, M-shaped hairlines, etc. but there are cis women out there with any combination you can think of from the "masculine" list.