Since the northern kingdom was removed by syria, it has never been returned to its land. Only judah was taken captive and allowed to rebuild it city.
representatives from all 12 tribes of israel returned.
the ones who didn't, just didn't.
Ezra 6:17
"And offered at the dedication of this house of God an hundred bullocks, two hundred rams, four hundred lambs; and for a sin offering for all Israel, twelve he goats, according to the number of the tribes of Israel."
Ezra 7:7
"And there went up some of the children of Israel, and of the priests, and the Levites, and the singers, and the porters, and the Nethinims, unto Jerusalem, in the seventh year of Artaxerxes the king."
Ezra 7:12-14
"Artaxerxes, king of kings, unto Ezra the priest, a scribe of the law of the God of heaven, perfect peace, and at such a time.
I make a decree, that all they of the people of Israel, and of his priests and Levites, in my realm, which are minded of their own freewill to go up to Jerusalem, go with thee.
Ezra 8:35
"Also the children of those that had been carried away, which were come out of the captivity, offered burnt offerings unto the God of Israel, twelve bullocks for all Israel, ninety and six rams, seventy and seven lambs, twelve he goats for a sin offering: all this was a burnt offering unto the LORD."
Acts 1:6
"When they therefore were come together, they asked of him, saying, Lord, wilt thou at this time restore again the kingdom to Israel?"
Acts 4:36
"And Joses, who by the apostles was surnamed Barnabas, (which is, being interpreted, The son of consolation,) a Levite, and of the country of Cyprus,
Acts 26:6-7
"And now I stand and am judged for the hope of the promise made of God unto our fathers:
Unto which promise our twelve tribes, instantly serving God day and night, hope to come. For which hope's sake, king Agrippa, I am accused of the Jews."
Matthew 15:24
"But he answered and said, I am not sent but unto the lost sheep of the house of Israel."
Luke 1:31-33
"And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS.
He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end."
Luke 1:68-69
"Blessed be the Lord God of Israel; for he hath visited and redeemed his people,
And hath raised up an horn of salvation for us in the house of his servant David;
Luke 2:36
"And there was one Anna, a prophetess, the daughter of Phanuel, of the tribe of Aser: she was of a great age, and had lived with an husband seven years from her virginity;"
Matthew 10:5-7
"These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into any city of the Samaritans enter ye not:
But go rather to the lost sheep of the house of Israel.
And as ye go, preach, saying, The kingdom of heaven is at hand."
~
Galatians 3:16
The promises were spoken to Abraham and to his seed. The Scripture does not say "and to seeds," meaning many people, but "and to your seed," meaning one person, who is Christ.