Is it possible to repent from major sins such as incestuous sexual harassment, and does Allah accept the repentance of the perpetrator?

Sincere repentance erases all sins, no matter how great they are, as Allah Almighty says: "Say, 'O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, He is the Forgiving, the Merciful.'" And in the Hadith: "The one who repents from sin is like one who has no sin." So, what occurred before puberty bears no sin, and what occurred after it is erased by repentance. Seek Allah's concealment, and do not tell anyone, and strive in acts of obedience.