John Gill Commentary Micah 4:7

"and I will make that which was lame a remnant, and that which was cast far off a strong nation: and Jehovah will reign over them in mount Zion from henceforth even for ever." — Micah 4:7 (ASV)

And I will make her that halted a remnant That is, make a reserve of her, and not utterly cut her off for her halting or sinning; that there may be a seed, a posterity descending from her, that shall serve the Lord, and appear to be a remnant according to the election of grace; which will be the persons called and gathered in the latter day.

and her that was cast afar off a strong nation ; Kimchi thinks this refers to the ten tribes that were carried far off into Media and other parts, (2 Kings 17:6); who shall now be a mighty and numerous people; and especially shall be strong in a spiritual sense in the Lord, and in the power of his might, in Christ and his grace, and in the faith of him; see (Isaiah 60:22) (Zechariah 12:8).

and the Lord shall reign over them in Mount Zion from henceforth, even
for ever ; that is, Christ, who is Jehovah our righteousness, shall reign over the converted Jews and Israelites in the church of God, often signified by Mount Zion; where they shall be assembled, and shall acknowledge him as their King, and be subject to his word and ordinances, and never more depart from him; nor will his government over them ever cease more, (Luke 1:32Luke 1:33).

This shows that this prophecy refers not to the times of the Gospel; for then the Jews would not have him to reign over them; but to times yet to come, the last days of the Gospel dispensation.