How would the repentance of one who followed the Dajjal and repented after the sun rises from the west be accepted, given that the Hadith explicitly states that repentance will not be accepted after this sign?

The emergence of the Dajjal will be before the sun rises from the west. Repentance will not cease until the sun rises from the west, based on the hadith in Muslim from Abu Hurayrah: "Whoever repents before the sun rises from the west, Allah will accept his repentance." The sun rising from the west is the first of the great signs indicating a change in the state of the upper world, by which time will end with the coming of the Hour. As for the Dajjal and 'Isa, they are from humankind, and they are a sign of the Hour's proximity.