Peter is talking specifically about the Day of the Lord, during which God vindicates his holy name. That time period begins with the Second Advent and ends at the final judgment.
This happens at the same time. The second advent ushers in Eternity and the hope of a NHNE. Peter in no way has a 1000 gap between the Lords promised second advent and his hope of a NHNE.
Peter shared Paul's view and considered it scripture.
14 So, beloved, since you are looking forward to these things, be diligent
and make every effort to be found by Him [at His return] spotless and blameless, in peace [that is, inwardly calm with a sense of spiritual well-being and confidence, having lived a life of obedience to Him]. 15 And consider the patience of our Lord [His delay in judging and avenging wrongs] as salvation [that is, allowing time for more to be saved];
just as our beloved brother Paul also wrote to you according to the wisdom given to him [by God], 16 speaking about these things as he does in all of his letters. In which there are some things that are difficult to understand, which the untaught and unstable [who have fallen into error] twist
and misinterpret,
just as they do the rest of the Scriptures, to their own destruction. 17 Therefore, [let me warn you] beloved, knowing these things beforehand, be on your guard so that you are not carried away by the error of [
c]unprincipled men [who distort doctrine] and fall from your own steadfastness [of mind, knowledge, truth, and faith], 18 but grow [spiritually mature] in the grace and knowledge of our Lord and Savior Jesus Christ. To Him be glory (honor, majesty, splendor), both now
and to the day of eternity. Amen.
This is what Peter is alluding to in his letter...,
Paul 2 thess 1
5
This is a positive proof of the righteous judgment of God [a sign of His fair verdict], so that you will be considered worthy of His kingdom, for which indeed you are suffering.
6 For after all it is
only just for God to repay with distress those who distress you, 7 and to
give relief to you who are so distressed and to us as well when the Lord Jesus is revealed from heaven with His mighty angels in a flame of fire, 8 dealing out [full and complete] vengeance to those who do not [seek to] know God and to those who ignore
and refuse to obey the gospel of our Lord Jesus [by choosing not to respond to Him].
9 These people will pay the penalty
and endure the punishment of everlasting destruction, banished from the presence of the Lord and from the glory of His power, 10 when He comes to be glorified in His saints on that day [that is, glorified through the changed lives of those who have accepted Him as Savior and have been set apart for His purpose], and to be marveled at among all who have believed, because our testimony to you was believed
and trusted [and confirmed in your lives].
11 With this in view, we constantly pray for you, that our God will count you worthy of your calling [to faith] and with [His] power fulfill every desire for goodness, and complete [your] every work of faith, 12 so that the name of our Lord Jesus will be glorified in you [by what you do], and you in Him, according to the [precious] grace of our God and the Lord Jesus Christ.