Luke 21:33 Heaven and earth shall pass away: but my words shall not pass away.
Rev 20:11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
In Luke, I think that he’s trying to emphasize the fact that He is eternal, rather than prophesying that Heaven will disappear.
Rev 21:
1
Then I saw a new heaven and a new earth. The former heaven and the former earth had passed away, and the sea was no more.
2
I also saw the holy city, a new Jerusalem, 3 coming down out of heaven from God, prepared as a bride adorned for her husband.
3
I heard a loud voice from the throne saying, “Behold, God’s dwelling is with the human race. He will dwell with them and they will be his people and God himself will always be with them (as their God).
4
He will wipe every tear from their eyes, and there shall be no more death or mourning, wailing or pain, (for) the old order has passed away.”
5
The one who sat on the throne said, “Behold, I make all things new.” Then he said, “Write these words down, for they are trustworthy and true.”
6
He said to me, “They are accomplished. I (am) the Alpha and the Omega, the beginning and the end. To the thirsty I will give a gift from the spring of life-giving water.
7
The victor will inherit these gifts, and I shall be his God, and he will be my son.
8
But as for cowards, the unfaithful, the depraved, murderers, the unchaste, sorcerers, idol-worshipers, and deceivers of every sort, their lot is in the burning pool of fire and sulfur, which is the second death.”
Everlasting life in Heaven, and Heaven itself is not temporary. Heaven version 2.0 will replace the current model.