Was "the Word" Jesus before He/It became flesh?
Yes. Plenty of passages where the Son was made manifest in the flesh before the incarnation (before He was born). Here's one that is impossible to deny:
Genesis 18:1 CSB17
“The LORD appeared to Abraham at the oaks of Mamre while he was sitting at the entrance of his tent during the heat of the day.”
As you know, when LORD appears in all caps, it is YHWH it is speaking about. But the Bible says,
Numbers 23:19 CSB17
“God is not a man, that he might lie,
or a son of man, that he might change his mind.
Does he speak and not act,
or promise and not fulfill?”
But it gets more complicated when we read in the Bible further where it says,
Isaiah 6:1 CSB17
“I saw the Lord seated on a high and lofty throne,”
And,
Daniel 7:13–14 CSB17
“I continued watching in the night visions,
and suddenly one like a son of man
was coming with the clouds of heaven.
He approached the Ancient of Days
and was escorted before him.
He was given dominion
and glory and a kingdom,
so that those of every people,
nation, and language
should serve him.
His dominion is an everlasting dominion
that will not pass away,
and his kingdom is one
that will not be destroyed.”
So the Lord is God, and the Son is God, and the Son is the exact imprint of YHWH as it is written,
Colossians 1:15–20 CSB17
“He is the image of the invisible God,
the firstborn over all creation.
For everything was created by him,
in heaven and on earth,
the visible and the invisible,
whether thrones or dominions
or rulers or authorities—
all things have been created through him and for him.
He is before all things,
and by him all things hold together.
He is also the head of the body, the church;
he is the beginning,
the firstborn from the dead,
so that he might come to have
first place in everything.
For God was pleased to have
all his fullness dwell in him,
and through him to reconcile
everything to himself,
whether things on earth or things in heaven,
by making peace
through his blood, shed on the cross.”
So if we put all the pieces together, then this YHWH who met with Abraham
was the Son, Christ.