Seventy weeks are determined upon thy people and upon thy
holy city, to...

"make reconciliation for iniquity..."

It didn't take Christ 490 years to make reconciliation for iniquity. He did it in a matter of hours (John 19:30 Collossians 1:20-22)

This reconciliation brought about by the death of Christ is available to all (both Jew and Gentile).

Yet we see here in Daniel 9:24 the prophet Daniel being told that it was going to take 490 years to complete the
six items listed in that verse - one of which was "to make reconciliation for iniquity."

What iniquity?

The national Jewish sin of rejecting the laws of God and then his Christ (beginning with the rebuilding of the wall by Cyrus' decree through the agreement with the false
messiah.

Israel's husband disannulled her agreement with hell and death (knowing everything in advance, her husband/creator had inserted a loophole into the law which he used to rescue his wayward wife (Isaiah 54:5/Numbers 30:8-9,
and now she must be reconciled.

We see a beautiful picture of this in Zechariah 3:1-5 Joshua, who was a high priest of Israel during the prophet Zechariah's life (Zechariah 3:1 Haggai 2:2) is shown standing before the angel of the Lord clothed with filthy garments.

Joshua, in this passage, is representing the nation he is high priest of at the time - Israel.

The Lord said, "take away the filthy garments... I have caused thine iniquity ("The Transgression" John5:43/Isaiah 28:14-18) to pass from thee (we are reconciled) ...."

This is a "national" reconciliation not a personal/ individual one and it is a future reconciliation - now, in this time, all "persons" (Jew or gentile) can be reconciled to God by faith in Jesus Christ who made peace for us and reconciled us by the blood of his cross (our sins and iniqities are covered and not imputed to us).

This scene in Zechariah 3 will not happen until after the time of "Jacob's Trouble" is completed.