One of the "purposes" of the [future] tribulation period is... to bring Israel into the New Covenant.
Consider a post I made some time back:
[quoting that post]
I've posted this before about the "days" (and/or "day") issues (the ones that are not "singular 24-hr days"):
Hosea 5:15-6:3 [re: Israel] -
14 For I am like a lion to Ephraim
and like a young lion to the house of Judah.
I, even I, will tear them to pieces
and then go away.
I will carry them off
where no one can rescue them.
15 Then I will return to My place
until they admit their guilt and seek My face;
in their affliction
they will earnestly [or, early] seek Me.”
6:1 Come, let us [Israel] return to the LORD.
For He has torn us [Israel] to pieces,
but He will heal us [Israel];
He has wounded us [Israel],
but He will bind up our [Israel's] wounds.
2 After two days He will revive [H2421] us [Israel]; [see H2421 in Ezekiel 37 also, vv.3,5,6,9,10,14]
on/in the third day He will raise [H6965] us [Israel] up, [see H6965 in Isaiah 26 also, v.19]
that we [Israel] may live [H2421 (ditto the above note)] in His presence.
3 So let us [Israel] know—
let us [Israel] press on to know the LORD.
As surely as the sun rises,
He will appear;
He will come to us [Israel] like the rain,
like the spring showers that water the earth [/as the latter rain unto the earth].
____________
[then... quoting Gaebelein's Commentary on Hosea 5]
"And like the lion after his attack withdraws to his den, so the Lord would withdraw from them, leave them and return to His place, waiting till their repentance comes and they seek Him early in their affliction.
"The last verse of this chapter has a wider meaning than the past judgment which came upon the house of Israel. The Lord of glory came to earth and visited His people. He came with the message and offer of the kingdom to the lost sheep of the house of Israel. He came unto His own, but His own received Him not. After they had rejected Him, delivered Him into the hands of the Gentiles to be crucified, He returned to His place. There He is now at the right hand of God, waiting for that day, when the remnant of Israel will repent and seek His face Acts 3:19-26. [I mentioned Acts 3:21's reference to FUTURE events (i.e. the "UNTIL") in my Post #71 of this thread (EDIT: in a different thread)]. That will be in their coming great affliction, in the time of Jacob’s trouble.
"Hosea 6:1-3. The division of the chapter at this point is unfortunate. The three verses of chapter 6 must not be detached from the previous chapter. Here we have the future repentance of the remnant of Israel, that is during the great tribulation. Believingly they will acknowledge His righteous judgment and express their faith and hope in His mercy and the promised blessings and restoration. They express what their great prophet Moses so beautifully stated in His prophetic song, that great vision given to him, ere he went to the mountain to die. “See now that I, even I, am He and there is no god with Me; I kill, and I make alive; I wound, and I heal; neither is there any that can deliver out of My hand” Deuteronomy 32:39. “After two days will He revive us; on the third day He will raise us up, and we shall live in His sight (literally, before His face).” They have been dead spiritually and nationally, but when the two days of their blindness and dispersion are over, there is coming for them the third day of life and [what is *LIKENED UNTO a] resurrection."
--Gaebelein, Commentary on Hosea 5 (taken from Bible Hub)
[end quoting Gaebelein; bold and underline mine; bracketed insertions mine]
____________
[note the passages I've listed before that *LIKEN this UNTO a RESURRECTION ^ (re: Israel's "FUTURE"): Romans 11:15(25-29); Ezekiel 37:12-14,20-23; Isaiah 26:16-21; Daniel 12:1-4,10; John 6:39 (distinct from v.40); Hosea 5:15-6:3 "after TWO days" and "IN the THIRD day"... which is "THE LAST" of these three (counting from His resurrection/ascension [32ad], per Hos5:15), or "THE LAST" of seven (if you count from creation/Genesis 1, i.e. the "sabbatismos" of Heb4:9 (see Ex31:13,17 "it [the sabbath/7th day] is A SIGN between Me and the children of Israel for ever"), aka the Millennial Day of REST, that is, the 7th Millennium, or "THE LAST")]
I believe it is a big mistake to view the phrase "The Last Day" to be referring to "a singular 24-hr day"
[end quoting that post]