Let's go slow .. what can we observe and know on the nature/origin/position of Jesus Christ from NT writings (not exhaustive):
- Son of GOD
- Son of the Most High
- Son of Man
- (biological) Son of the virgin Mary
- Servant of GOD
- Messiah of GOD
- Lord/Master
- Conceived by the Holy Spirit
- Came down from heaven
- Word of (the) GOD
- Exact imprint of GOD
- High Priest
- mediator between GOD and men
- the Way, Truth and Life
- the Way to the Father
- sits at the right hand of GOD
- given all power in Heaven and on Earth
- given the name above all other names (='Jesus', but presumably not above 'YHWH' - see Philippians 2:9 and 1 Corinthians 15:27)
Reference verses could be given for all of those points (but that may not be necessary for now); from this I can safely deduce Jesus is fully the son of Mary, so from the same substance, so fully human. Likewise, he is fully the Son of GOD (begotten;
not created like Arius contended), so from the same substance as GOD, so fully divine/god/GOD-like (I don't have any other words to express this, but you get the idea).
Now if <b> is said to be son of <a> (if <a> is being used in the identity sense), this by logic also means <b> cannot be <a> him/itself; that is literally impossible. My own son is me-like, but he is not me.
In Luke 1:32 we read:
He will be great and will be called the Son of the Most High. And the Lord God will give to him the throne of his father David, ..
Clearly, the phrase 'Most High' is used as unique identifier (only one can be the Most High); when Jesus is called the Son of the 'Most High', he would be 'Most-High'
-like, but he cannot be the same being in the identity sense; and no Jew in Jesus' or Luke's audience would have interpreted it this way.
Jews in the 1st century didn't think of the coming Messiah as identical to YHWH, as TNK writings overwhelmingly don't describe the Messiah that way, quite on the contrary. E.g.:
Jeremiah 23:5-6
Behold, the days are coming, declares YHWH, when I will raise up for David a righteous Branch, and he shall reign as king and deal wisely, ..
Jeremiah 30:9
But they shall serve YHWH their God and David their king, whom I will raise up for them.
Jeremiah 33:15-16
In those days and at that time I (=YHWH) will cause a righteous Branch to spring up for David, and he shall execute justice and righteousness in the land. In those days Judah will be saved, and Jerusalem will dwell securely. And this is the name by which it will be called: ‘YHWH is our righteousness.’
Hosea 3:5
Afterward the children of Israel shall return and seek YHWH their God, and David their king, and they shall come in fear to the Lord and to his goodness in the latter days.
I could list many more verses, but you get the idea: YHWH and the Messiah are presented as two quite distinct beings. Maybe the most explicit verse would be:
Isaiah 11:2-3
And the Spirit of YHWH shall rest upon him,
the Spirit of wisdom and understanding,
the Spirit of counsel and might,
the Spirit of knowledge and the fear of the YHWH.
Here we have the Messiah and the Spirit of knowledge and fear of YHWH resting on him; which would be a very unnatural/counter-intuitive reading IF Messiah
is YHWH himself in the identity sense.
Yet we also have Zechariah 14:3-4:
Then YHWH will go out and fight against those nations as when he fights on a day of battle. On that day his feet shall stand on the Mount of Olives that lies before Jerusalem on the east, ..
Here we have YHWH, who is a spirit, how is invisible and who no one has seen at anytime (John 1:18, 1 John 4:12) all of sudden presented with feet that stand on the Mount of Olives; presumably this is about Jesus' feet on his return to Earth. How to reconcile these perspectives/positions? How can a spirit (1 John 4:24) have feet?
The answer would be that Jesus does nothing on his own behalf, everything he says/does/creates/judges is because his Father instructs him to do so (John 5:19, John 5:30, John 6:38). He is in everything GOD's delegate and agent; which exactly matches the Biblical/Middle-East semantics of the 'son' title. Jesus literally is GOD's son, but he also acts as GOD's son: his full delegate/agent.
So when Jesus speaks; YHWH speaks, when Jesus feet land on the Mount of Olives, YHWH's feet land, when Jesus judges, YHWH judges, etc..
So when the question is asked: is Jesus YHWH? I would humbly propose to say both:
- yes, in the sense that he 'represents' YHWH; the same way Jesus says 'this is my blood', or that 'the Lord is the Spirit' (2 Corinthians 3:17). Jesus is the exact imprint of GOD, so Jesus and YHWH are conflated.
- no, in the sense that Jesus is a different being identity-wise from YHWH; he is the Son of GOD. The NT writings mention the phrase 'the God of Jesus'
seven times. At Jesus' triumphal entry into Jerusalem, the bystanders quote Psalm 11:9:
.. blessed is he (=Jesus) who comes in the name of YHWH ..
Enough for now, back to work

I hope you can make sense of it. (btw: I am aware of the 'I AM' statements in John, just this post was already lengthy enough)