Jesus died! What else do you want to know?
Does the Quran say where he went and what he did in unequivocal terms?
No, so we can only speculate until clear proof is found.
But we do know TWO FACTS from the Quran which says Jesus was not crucified:
4:157 And for claiming, “We killed the Messiah Jesus son of Mary, God’s Messenger.” They never killed him and never crucified him. But it appeared so to them and the matter remained dubious to them. Those who hold conflicting views on this issue are but confused. They have no real knowledge and they are following mere conjecture. Most certainly, they never killed him.
4:158 Nay, God exalted him in His Sight. (They had plotted thinking that crucifixion was a death of curse. But God raised him in honor. See 3:55). God is Almighty, Wise.
And the Quran says he is DEAD, all Messengers before the Last one are DEAD:
3:144 Muhammad is only a Messenger. The Messengers before him have passed on. So, if he died or were slain, would you turn about on your heels? But anyone who turns about his heels, would no harm God in the least. And God will soon reward those who remain appreciative (for the guidance). [The System the Prophet has established is to become a beacon of light for all humanity. The believers will reap the fruit of the Benevolent System here and, then, get rewarded in the Hereafter. 3:101, 3:185, 35:10]
3:145 No one dies except by God’s leave, at a term appointed by His laws. Whoever seeks the rewards of this world, We give him thereof, and whoever seeks the returns of the Hereafter, We shall grant him thereof. We will soon reward those who are appreciative (for serving Him).