Does a repentant girl need to offer expiation for exposing her body to men via camera three times, and if so, what is it?

The expiation for sin is repentance to Allah. Allah accepts the repentance of His servant and rejoices in it, and He erases what preceded it. Thus, one who repents from a sin is like one who has no sin. Repentance involves abandoning the sin, regretting it, and resolving never to return to it. The servant should seek Allah's help, stay away from disobedience, occupy their time with beneficial deeds, associate with righteous people, listen to admonitions, and persist in supplication.