Is there divine punishment for a girl who lost her virginity with her fiancé before marriage, or is that permissible due to her readiness to marry him?

You and this man have committed a grave sin by disobeying the command of Allah and His Messenger, as the Prophet (peace and blessings of Allah be upon him) said: "Whoever believes in Allah and the Last Day should not be alone with a woman who has no mahram with her, for indeed the third of them is Shaytan (Satan)." The fiancé is a stranger to his fiancée, so it is not permissible for him to be alone with her or to touch her. Therefore, you both must offer sincere repentance (tawbah nasuh) to Allah. If you repent, Allah will accept your repentance and forgive your misdeeds, as Allah Almighty says: (And He it is Who accepts repentance from His servants and pardons sins, and He knows what you do) and (Except for those who repent, believe and do righteous deeds; for them Allah will change their evil deeds into good ones. And Allah is Oft-Forgiving, Most Merciful). If repentance occurs, then marriage between you two is permissible.