Think about the millennium, and about our understanding of it. Though we are not told a lot, we are told enough to know a few things. First, the millennium occurs before the final destruction of the lost. Second, before that final destruction, the saved spend this time getting a lot of questions answered. So much so that they themselves get to help partake of that judgment. That is, they themselves are judging.
“Do you not know that the saints will judge the world?” (1 Cor. 6:2, NKJV). And: “Do you not know that we shall judge angels?” (1 Cor. 6:3, NKJV). Also, as we read this week, during this thousand years “judgment was committed to them” (Rev. 20:4, NKJV); that is, the saints. Thus, these two points together reveal an important truth: none of the lost will face final judgment until after the millennium, until the saved not only understand why the wicked are lost but also play a role in passing judgment upon them. Think about what this tells us about the character of God and the openness of His government: before a single person faces the ultimate fate of the lost, God’s people will get to see very clearly the justice and fairness of God’s final judgment upon them. It’s going to be painful, for sure; but when it’s finished, as we have already seen, we will shout: “‘You are just in these judgments, O Holy One, you who are and who were'” (Rev. 16:5, NIV).