Are charity and gifts considered expiation for apostasy, in a case of extreme remorse and a desire for worldly torment as a mercy in the grave?

Do not supplicate to Allah to punish you, but rather supplicate to Him to have mercy on you in this world and the Hereafter. Sincere repentance erases sins, for the one who repents from a sin is like one who has no sin. No matter how great the sin, Allah’s mercy is vaster, and Allah forgives all sins for those who despair. Increase in doing good deeds like charity, for indeed, they remove evil deeds.