If during the millennium the Church dwells in the heavenly Jerusalem, and tribulation survivors live in natural bodies on the restored earth, where do the martyred tribulation saints belong? Will their resurrected bodies be like those of the Church? Do they belong with Israel, or with the Church or some other group? In other words. how will they fit into the millennium, what is their purpose in God’s plan?
As far as we know all resurrection bodies will be alike in their general characteristics; physical but immortal, with no sin nature.
Three groups of tribulation martyrs are mentioned in the Book of Revelation.
The group in Rev. 6:9-11 is only told to be patient until the rest of the martyrs have been killed. Nothing more is said about them.
The group in Rev. 7:9-17 will serve God day and night in His temple but are not called priests. God has a Temple in Heaven and will have one in Israel during the Millennium. We’re not told if it’s one or the other or both, but we are told that there will not be a Temple in the New Jerusalem (Rev. 21:22).
The group of martyrs mentioned in Rev. 20:4 will reign with Christ for 1,000 years but are never called Kings. Again we’re not given any specifics about their reign, but I believe it will be on Earth in some role subordinate to the Church.
None of these groups belong to the Church. I believe Jewish martyrs will live in Israel, but the Bible doesn’t say where Gentile martyrs will live. Perhaps it will be in the nations they’ll help rule.