“They serve a copy and shadow of the heavenly things. For when Moses was about to erect the tent, he was instructed by God, saying, “See that you make everything according to the pattern that was shown you on the mountain.” Hebrews 8:5
“Thus it was necessary for the copies of the heavenly things to be purified with these rites, but the heavenly things themselves with better sacrifices than these. For Christ has entered, not into holy places made with hands, which are copies of the true things, but into heaven itself, now to appear in the presence of God on our behalf.” Hebrews 9:23-24
Christ did not enter a man made sanctuary that was only a copy of the true one, He entered heaven itself. The earthly sanctuary was a copy of the true one in heaven. The new Jerusalem that John sees descending from heaven to the new earth after the White Throne judgement is in the intermediate or present heaven.
“After this I looked, and the sanctuary of the tabernacle of witness in heaven was opened, and out of the sanctuary came the seven angels with the seven plagues, clothed in pure, bright linen, with golden sashes around their chests.” Revelation 15:5-6
“But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, and to innumerable angels in festal gathering, and to the assembly of the firstborn who are enrolled in heaven, and to God, the judge of all, and to the spirits of the righteous made perfect, and to Jesus, the mediator of a new covenant ” Hebrews 12:22-24
There is a city of the living God: the heavenly Jerusalem which John saw prophetically coming down to the new earth.
“Then I saw a new heaven and a new earth, for the first heaven and the first earth had passed away, and the sea was no more. And I saw the holy city, new Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband. And I heard a loud voice from the throne saying, “Behold, the dwelling place of God is with man. He will dwell with them, and they will be his people, and God himself will be with them as their God.” Revelation 21:1-2