Where was he before his incarnation?
Jesus said in response to questions by the Pharisees, “Before Moses was, I AM”
His use of the Tetragrammaton (YHWH) indicates He is God. The Hebrew pictograms define itself as “open hand/nailed/tree”.
John clearly states that He (Jesus) the Word or “Logos, breath, essence, was “with God, was God in the beginning” and was the Creator of all things.
Pretty clearly defines Jesus the Christ as God the Man, equal to and coexisting with God the Father, and God the Spirit. Three in one, not three “ones”.
Blessings