Yes, over time, “vagina” has been casually redefined to refer to the whole kit and caboodle. Vulva, uterus, they throw in everything but the kitchen sink and call it “vagina.” Makes me crazy. They don’t know where it is and they don’t know what it is. It makes Victorian ladies seem positively enlightened. There’s no excuse for it!
Women have no problem finding their private parts - most have to bother with them once a month. But when you need a mirror to find them, most women just don’t bother getting the whole visual picture. Also, unlike men, women are not obsessed with their privates.