Analysis of illness: Generally, the vaginal opening of virgins is relatively tight. If they squat, they may open a little, but they can't see the vaginal wall.
Introduction: Your condition may be because the vulva or labia minora is too long, or the hymen is deep. Don't worry too much. If you are really worried, I suggest going to the gynecology department for a check-up.
Wish you good health.