WhileGod created all spiritual beingsthrough Jesus (Colossians 1:16), orthodox Christianity does not view Jesus as a “first created spirit son.”
Thus, whileAdam is the "first human son" in a created sense,Jesus is uniquely the eternal Son of God who becomes incarnate to redeem humanity, not just another created being.
Jesus as the "last Adam"is essential because, unlike the first Adam, Jesus brings life and reconciliation through His death and resurrection.
[38 son of Eʹnosh, son of Seth, son of Adam, son of God.]
[1 The beginning of the good news about Jesus Christ, the son of God]
[ 47 The first man is from the earth and made of dust; the second man is from heaven. 48 Like the one made of dust, so too are those made of dust; and like the heavenly one, so too are those who are heavenly.]
[24 God is a Spirit,]
[6 Now the day came when the sons of the true God entered to take their station before Jehovah]
[ 14 Are they not all spirits for holy service,]
[ 5 Keep this mental attitude in you that was also in Christ Jesus, 6 who, although he was existing in God’s form, did not even consider the idea of trying to be equal to God. 7 No, but he emptied himself and took a slave’s form and became human.]
[ 18 For Christ died once for all time for sins, a righteous person for unrighteous ones, in order to lead you to God. He was put to death in the flesh but made alive in the spirit. 19 And in this state he went and preached to the spirits in prison,]
[ 6 But when he again brings his Firstborn into the inhabited earth]
[28 so also the Christ was offered once for all time to bear the sins of many; and the second time that he appears it will be apart from sin, and he will be seen by those earnestly looking for him for their salvation.]
TBC...