I agree. But it isn't a remnant.
The tribes of Israel that survived the slaughter in ad 70 and we’re scattered into the earth are the remnant it’s based upon ot prophecy
“and say, Ye mountains of
Israel, hear the word of the Lord GOD; Thus saith the Lord GOD to the mountains, and to the hills, to the rivers, and to the valleys; Behold,
I, even I, will bring a sword upon you, and I will destroy your high places. And your altars shall be desolate, and your images shall be broken: and I will cast down your slain men before your idols. In all your dwellingplaces
the cities shall be laid waste, and the high places shall be desolate; that your altars may be laid waste and made
desolate, and your idols may be broken and cease, and your images may be cut down, and
your works may be abolished.
And
the slain shall fall in the midst of you, and ye shall know that I am the LORD.
Yet will I leave a remnant, that ye may have some that shall escape the sword among the nations, when ye shall be scattered through the countries. And they that escape of you shall remember me among the nations whither they shall be carried captives, ( Jewish dispersia by rome after ad 70s destruction of Jerusalem )
because
I am broken with their whorish heart, which hath departed from me, and with
their eyes, which go a whoring after their idols: and they shall lothe themselves for
the evils which they have committed in all their abominations. And they shall
know that I am the LORD, and that I have not said in vain that I would do this evil unto them.”
Ezekiel 6:3-4, 6-10 KJV
“And when ye shall see Jerusalem compassed with armies, then know that the desolation thereof is nigh. Then let them which are in Judæa flee to the mountains; and let them which are in the midst of it depart out; and let not them that are in the countries enter thereinto. For these be the days of vengeance, that all things which are written may be fulfilled. And they shall fall by the edge of the sword, and shall be led away captive into all nations: and Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles be fulfilled.”
Luke 21:20-22, 24 KJV
in revelation you see the remnant of Jews before you see the gentile crowd
“And I heard the number of them which were sealed: and there were sealed an
hundred and forty and four thousand of all the tribes of the children of Israel.”
Revelation 7:4 KJV
“After this ( nt time period when the gospel was sent to all people ) I beheld, and, lo, a
great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;”
Revelation 7:9 KJV
The remnant of Israel is from the old covenant doctrine the many nations are from the new it’s why there’s a finite number of them it’s only a remnant of the children of Israel because of the old covenant cirse . The gentile group is innumerable
a lot of the terminology in the nt is established in ot orophecy foretelling the New Testament time period such as “the remnant “ in the ot there’s a whole doctrine regarding a remnant he would spare when he had Jerusalem destroyed for breaking thier covenant