It is talking about the destruction of eternal fire, the fate of those that are to be subjected to the "punishment of eternal fire" as Jude also points out. hence the reason why I started with this verse, I use actual exegesis to show how this concept is more fully addressed by related texts of scripture. Jude explicitly links the two events together.
So unless you are determined to get out the scissors when reading Jude as he connects Sodom and Gomorrah to the future destruction of the wicked, you have a problem there and simply telling us "not to look" is not a very compelling solution
hint. IT is called exegesis. We take a single topic and allow scripture to inform us on that topic even if it is not in the same chapter.
Hint: you can’t just associate verses together just because you want to. Exegesis requires much more hermeneutical elements including the various contexts and word studies. Just because you call it exegesis doesn’t mean that it is one.
For one, the verse in Matt. 25 is talking about the accursed people going into the eternal fire.
““Then He will also say to those on His left, ‘Depart from Me,
you accursed people, into the eternal fire which has been prepared for the devil and his angels;”
Matthew 25:41 NASB2020
“Then He will also say to those on His left, ‘Depart from Me, you accursed people, into the eternal fire which has been prepared for the devil and his angels
bible.com
The verse in Jude speaks of the city with the people, “they”, and it also includes the sins that resulted in their eternal punishment just as in the verse in Matthew.
“just as Sodom and Gomorrah and the cities around them, since
they in the same way as these angels indulged in sexual perversion and went after strange flesh, are exhibited as an example in undergoing the punishment of eternal fire.”
Jude 1:7 NASB2020
just as Sodom and Gomorrah and the cities around them, since they in the same way as these angels indulged in sexual perversion and went after strange flesh, are exhibited as an example in undergoing
bible.com
However, the verse in 2 Peter speaks strictly of the cities not the people. Notice that the cities are destroyed BY reducing them to ashes. No mention of the people in this verse.
“and if
He condemned the cities of Sodom and Gomorrah to destruction by reducing them to ashes, having made them an example of what is coming for the ungodly;”
2 Peter 2:6 NASB2020
and if He condemned the cities of Sodom and Gomorrah to destruction by reducing them to ashes, having made them an example of what is coming for the ungodly
bible.com
Your “exegesis” failed. It is important that language become part of a proper exegesis.