What is the ruling on someone who claims on social media to be a girl while being a young man, for a specific purpose or with the intention of fraud?

Whoever pretends to be a girl on social media commits a major lie, and this is not a characteristic of believers, but rather of hypocrites. If a wicked intention, such as fraud and deception, is added to that, the sin becomes greater. The perpetrator must offer sincere repentance to Allah Almighty.