Is it obligatory to make up the day and offer expiation for someone who experiences a wet dream after hearing the dawn prayer (Fajr) adhan, while being forgetful?

Masturbation is forbidden and invalidates the fast. If semen is intentionally ejaculated after the dawn (Fajr) call to prayer, with knowledge of its prohibition and while remembering (the fast), then you must make up that day. However, if you were forgetful, your fast is valid, but it is recommended to make up that day as a precaution. You must fear Allah and avoid this forbidden practice, especially in Ramadan, where its prohibition is intensified. Its expiation is sincere repentance, which involves abandoning the sin, resolving not to return to it, and regretting what has passed.