Does the prophecy in 1 Enoch 10:17-21 concern the righteous after the Flood, or a later time after the final Judgment?

In the tenth chapter of 1 Enoch, in verse 17 (or 23 in some manuscripts), following the sentence on Semyaza and the other fallen angels who procreated the nephilim, God says that: 11 To Michael likewise the Lord said, Go and announce his c…