As a figure of speech. Christ said the law could not change at all until Heaven and Earth passed away. The law changed so that means Heaven and Earth did pass away but since the old Earth is still here we know it was a symbolic passing away. I think the change between covenants explains this.
You are making the Scripture fit your doctrine, you should be making your doctrine fit the Scripture
But it's not a figure of speech if it is prophesied to happen many times litearlly saying it will happen
Revelation 21:1-2, “And I saw a renewed heaven and a renewed earth, for
the former heaven and the former earth had passed away, and the sea is no more. And I, Yoḥanan, saw the set-apart city, renewed Yerushalayim, coming down out of the heaven from Yah, prepared as a bride adorned for her husband.”
Isaiah 66:22-24, "“For as
the new heavens and the new earth that I make stand before Me,” declares יהוה, “so your seed and your name shall stand. “And it shall be that from New moon to New moon, and from Sabbath to Sabbath,b all flesh shall come to worship before Me,” declares יהוה. Footnote: bPossible meaning: Every week on the Sabbath. “And they shall go forth and look upon the corpses of the men who have transgressed against Me. For their worm shall not die, and their fire not be quenched. And they shall be repulsive to all flesh!”
Isaiah 65:17, ""For behold,
I create new heavens and a new earth; And the former things will not be remembered or come to mind."
2 Peter 3:9-14, “9 יהוה is not slow in regard to the promise, as some count slowness, but is patient toward us, not wishing that any should perish but that all should come to repentance. 10 But the day of יהוה shall come as a thief in the night,
in which the heavens shall pass away with a great noise, and
the elements shall melt with intense heat, and the earth and the works that are in it shall be burned up. 11 Seeing all these are to be destroyed in this way, what kind of people ought you to be in set-apart behavior and reverence, 12 looking for and hastening the coming of the day of Elohim, through which
the heavens shall be destroyed, being set on fire, and the elements melt with intense heat! 13 But according to His promise we wait for
a renewed heavens and a renewed earth in which righteousness dwells. 14 So then, beloved ones, looking forward to this, do your utmost to be found by Him in peace, spotless and blameless.”
Isaiah 51:6, 6 “Lift up your eyes to the heavens, and look on the earth beneath, for
the heavens shall vanish like smoke, and the earth wear out like a garment, and those who dwell in it die as gnats. But My deliverance is forever, and My righteousness is not broken."
1 John 2:17, 17 And
the world passes away, and the lust of it, but the one doing the desire of Elohim remains forever."
Malachi/Malakyah 4:1-4, “For look,
the day shall come, burning like a furnace, and all the proud, and every wrongdoer shall be stubble. And the day that shall come shall burn them up,” said יהוה of hosts, “which leaves to them neither root nor branch. 2 “But to you who fear My Name the Sun of Righteousness shall arise with healing in His wings. And you shall go out and leap for joy like calves from the stall. 3 “And you shall trample the wrongdoers, for they shall be ashes under the soles of your feet on the day that I do this,” said יהוה of hosts. 4 “Remember the Torah of Mosheh, My servant, which I commanded him in Ḥorĕḇ for all Yisra’ĕl – laws and right-rulings."
Isaiah 24:1-6, "See, יהוה is making the earth empty and making it waste, and shall overturn its surface, and shall scatter abroad its inhabitants. 2 And it shall be – as with the people so with the priest, as with the servant so with his master, as with the female servant so with her mistress, as with the buyer so with the seller, as with the lender so with the borrower, as with the creditor so with the debtor; 3 the earth is completely emptied and utterly plundered, for יהוה has spoken this word. 4 The earth shall mourn and wither, the world shall languish and wither, the haughty people of the earth shall languish. 5 For the earth has been defiled under its inhabitants, because they have transgressed the Torah, changed the law, broken the everlasting covenant. 6
Therefore a curse shall consume the earth, and those who dwell in it be punished. Therefore the inhabitants of the earth shall be burned, and few men shall be left.”