As an evangelical universalist, I believe all humanity has already been reconciled to God through the cross (2 Cor. 5:19, Eph. 2:16, Col. 1:20). However, with the exception of those individuals who have been born again, all people, including the Jews, are still slaves to sin, and must individually repent and be born again in order to avoid hell-Hades-Gehenna, and the subsequent remedial (but terrible) lake of fire.
We futurists believe there will be a future regathering and national restoration of Israel, and (eventually) a coming repentance of the Jews, en masse, at the future-to-us bodily return of Christ.
Hence, this passage from Romans 11—
25 I do not want you to be ignorant of this mystery, brothers and sisters, so that you may not be conceited: Israel has experienced a hardening in part until the full number of the Gentiles has come in, 26 and in this way all Israel will be saved. As it is written: “The deliverer will come from Zion; he will turn godlessness away from Jacob. 27 And this is my covenant with them when I take away their sins.”
—has to do with the yet-future physical Parousia of Christ, a.k.a., The Second Coming of Christ, and the repentance of the regathered Jews.
At the one and only, physical, Second Coming of Christ, the repentance of regathered Israel, as a group, upon recognizing Jesus, their messiah and savior, is prophesied by Zechariah (c. 520 BC):
12:9 On that day I will set out to destroy all the nations that attack Jerusalem. 10 “And I will pour out on the house of David and the inhabitants of Jerusalem a spirit of grace and supplication. They will look on me, the one they have pierced, and they will mourn for him as one mourns for an only child, and grieve bitterly for him as one grieves for a firstborn son. 11 On that day the weeping in Jerusalem will be as great as the weeping of Hadad Rimmon in the plain of Megiddo. 12 The land will mourn, each clan by itself, with their wives by themselves: the clan of the house of David and their wives, the clan of the house of Nathan and their wives, 13 the clan of the house of Levi and their wives, the clan of Shimei and their wives, 14 and all the rest of the clans and their wives.
And here is a description by Zechariah of the subsequent “Millennial Age,” when Christ reigns from Jerusalem:
14:16 Then the survivors from all the nations that have attacked Jerusalem will go up year after year to worship the King, the Lord Almighty, and to celebrate the Festival of Tabernacles.