I recently learned that some believe Jesus is Michael the Archangel

Hebrews chapter 1 denies this and identifies Him as Jehovah in Psalm 102.

God, having spoken long ago to the fathers in the prophets in many portions and in many ways, in these last days spoke to us in His Son, whom He appointed heir of all things, through whom also He made the worlds, who is the radiance of His glory and the exact representation of His nature, and upholds all things by the word of His power; who, having accomplished cleansing for sins, sat down at the right hand of the Majesty on high, having become so much better than the angels, as He has inherited a more excellent name than they.

For to which of the angels did He ever say, (Psalm 2:7)

“You are My Son, Today I have begotten You”?

And again, (2 Samuel 7:14)

“I will be a Father to Him And He shall be a Son to Me”?

And when He again brings the firstborn into the world, He says,(Psalm 97:7)

“And let all the angels of God worship Him.”

And of the angels He says, (Psalm 104:4)

“Who makes His angels winds, And His ministers flaming fire.”

But of the Son, (Psalm 45:6-7)

“Your throne, O God, is forever and ever, And the scepter of uprightness is the scepter of Your kingdom. You have loved righteousness and hated lawlessness; Therefore God, Your God, has anointed You With the oil of gladness above Your companions.”

And, (Psalm 102:25-28) [Psalm 102 is directed to Jehovah.]

“You, Lord, in the beginning founded the earth, And the heavens are the works of Your hands; They will perish, but You remain; And they all will wear out like a garment, And like a mantle You will roll them up; Like a garment they will also be changed. But You are the same, And Your years will not come to an end.”

But to which of the angels has He ever said, (Psalm 110:1)

“Sit at My right hand, Until I put Your enemies as a footstool for Your feet”?

Are they not all ministering spirits, sent to render service for the sake of those who will inherit salvation?

Jesus is not an angel, he is Jehovah, the creator of all things. Also, Jesus is called the only begotten son of God, which makes him the same kind of being as God. Since there is only one God, this can only be the case if He and the Father are one. "I and the Father are one" (John 10:30).