Is a girl who was exposed to a "forbidden" incident in her childhood, more than 12 years ago, still considered a "virgin," and must she inform a suitor about it?

A person is not held accountable for forbidden acts committed before puberty. However, it is obligatory to repent and seek forgiveness for what occurred after puberty. There is no obligation to inform the fiancé about what happened before marriage. If the hymen is ruptured after marriage, there is no need to explain the reason due to the multitude of its causes. It is not permissible to go to the hospital to expose one's awrah (intimate parts) without necessity.