You haven't provided anything but opinion that marked people will be in the millennium.
If there are no marked people in the millennium, then why have a millennium?
Does Jesus rule over the saved nations when he comes for Just 1000 years.?
We remain with him forever and forever, yes?
The millennium has numbers like the sand of the sea that are clearly not in the book of life.
All those not in the book of life FROM THE FOUNDATION OF THE WORLD have booked their place for eternal separation from his presence as 2 thess 1 teaches.
Revelation 13:8
All the inhabitants of the earth will fall down
and worship him,
everyone whose name has not been written since the foundation of the world in the Book of Life of the Lamb who has been slain [as a willing sacrifice].
- Revelation 20:12
And I saw the dead, the great and the small, standing before the throne, and books were opened. Then another book was opened, which is the Book of Life; and the dead were judged according to what they had done as written in the books [that is, everything done while on earth].
- Revelation 20:15
And if anyone’s name was not found written in the Book of Life, he was hurled into the lake of fire.
Clearly a future 1000 reign over these people is pointless as they are destined to drink the wrath of God undiluted for having this mark.
As is clearly stated in 2 Thess 1 they are eternally separated on the day those without the mark are glorified in him.
Rev 14
“Whoever worships the beast and his image and receives the mark [of the beast] on his forehead or on his hand, 10 he too will [have to] drink of the wine of the wrath of God, mixed undiluted into the cup of His anger; and he will be tormented with fire and brimstone (flaming sulfur) in the presence of the holy angels and in the presence of the Lamb (Christ).
11 And the smoke of their torment ascends forever and ever; and they have no rest day and night—those who worship the beast and his image, and whoever receives the mark of his name.” 12 Here is [encouragement for] the steadfast endurance of the saints (God’s people), those who
habitually keep God’s commandments and their faith in Jesus.
13 Then I heard [the distinct words of] a voice from heaven, saying, “Write, ‘Blessed (happy, prosperous, to be admired) are the dead who die in the Lord from now on!’” “Yes, [blessed indeed],” says the Spirit, “so that they may rest
and have relief from their labors, for their deeds do follow them.”