I agree, the physical Person of Jesus had one soul as every other human being.
I don’t think the term Son of God is meant to be taken literally as if to say God gave birth, either. I realize that in the OT the term son denotes a special person, prophet or the nation of Israel. Nevertheless, the term Son of God is uniquely applied to Jesus in an exclusive , special way which I believe demonstrates His eternal existence and relationship with the Father .
Then those who were in the boat came and worshiped Him, saying, “Truly You are the Son of God.” Matthew 14:33
“He who believes in Him is not condemned; but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God.
John 3:18
Also we have come to believe and know that You are the Christ, the Son of the living God.”
John 6:69
She said to Him, “Yes, Lord, I believe that You are the Christ, the Son of God, who is to come into the world.” John 11:27
What is the doctrine of eternal Sonship and is it biblical? Was Jesus always the Son of God, or did He become the Son of God at the incarnation?
www.gotquestions.org
I don’t agree, nor believe the Roman church/state initiated the belief/doctrine concerning the Deity of Christ or the Triune Nature of the Godhead, although validated it against various other heresies. I’d say the early Apostles and church came to realize and understand Who Jesus was after His resurrection…
And Thomas answered and said to Him, “MyLord and my God!” John 20:28
And they stoned Stephen as he was calling on
God and saying, “Lord Jesus, receive my spirit.” Acts 7:59