But you're again ignoring what the Bible says (Rev 7:4-8 WEB):
4) I heard the number of those who were sealed, one hundred forty-four thousand, sealed out of every tribe of the children of Israel:
5) of the tribe of Judah were sealed twelve thousand, of the tribe of Reuben twelve thousand, of the tribe of Gad twelve thousand,
6) of the tribe of Asher twelve thousand, of the tribe of Naphtali twelve thousand, of the tribe of Manasseh twelve thousand,
7) of the tribe of Simeon twelve thousand, of the tribe of Levi twelve thousand, of the tribe of Issachar twelve thousand,
8) of the tribe of Zebulun twelve thousand, of the tribe of Joseph twelve thousand, of the tribe of Benjamin were sealed twelve thousand.
That's 5 verses making it very clear that all 144,000 are all Jewish, and are all from the twelve tribes mentioned (none from the tribe of Dan).
You're also ignoring that the Book of Revelation describes a sequence of events, and that the church has already been completed and resurrected and are in heaven prior to the point when the angel with the seal of God tells the four angels which are holding the four winds of the earth, to withhold the destructive winds until the 144,000 have been sealed.
The only other mention of the 144,000 is later on in the sequence of events (Rev 14:1-3):
I saw, and behold, the Lamb standing on Mount Zion, and with him a number, one hundred forty-four thousand, having his name, and the name of his Father, written on their foreheads.
I heard a sound from heaven, like the sound of many waters, and like the sound of a great thunder. The sound which I heard was like that of harpists playing on their harps.
They sing a new song before the throne, and before the four living creatures and the elders. No one could learn the song except the one hundred forty-four thousand, those who had been redeemed out of the earth.
They are still on the earth (Mount Zion), when they hear a sound from heaven, a sound like harpists playing ("the twenty-four elders fell down before the Lamb, each one having a harp" - Rev 5:8), which is the resurrected church worshiping God with a new song. It then says that no one (on earth) could learn that new song except the 144,000. They are separate from the church and they are Jews living on the earth, the first to be redeemed from among mankind, they were "redeemed by Jesus from among men, the first fruits to God and to the Lamb" (Rev 14:4). They are not part of the new creation, the body of Christ, they are eternally human, living on the earth. They will be the earthly part of God's kingdom on the earth during the Millennial Age:
(Isa 2:2) It shall happen in the latter days, that the mountain of Yahweh’s house shall be established on the top of the mountains, and shall be raised above the hills; and all nations shall flow to it.
(Isa 2:3) Many peoples shall go and say, “Come, let’s go up to the mountain of Yahweh, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths.” For out of Zion the law shall go out, and Yahweh’s word from Jerusalem.