It seems to me that the answer to this question is a matter of theology. Having posed the question, I take responsibility for it and I answer it myself, prompted by the answer that I have up-voted as I believe that this interpretation is (most probably) the correct one.
I accept any down-voting myself (on the basis of straying into what is termed ‘theology’) because I did not want to leave the question unanswered on the page. It deserves a full answer, I think.
When God spoke at the first, he said [amar, to say, Strong H559], ‘Let there be light,’ [KJV]
Thereafter, all that he spoke to Israel was in preparation of the Everlasting Testament, Ezekiel 37:26 and Hebrews 13:20. All that was depicted in the wilderness, by artefact and by commandment and by ritual, only prefigured the Testament that would follow and the Testator, Hebrews 9:16,17, who should be born, should suffer, should die and should arise again.
All that God said, amar, all his word, emer, was with this in view. His name was revealed, at the time, to be YHWH. It was all that could be revealed, for the time then present.
It was yet to be revealed that The Word had been, in existence, from the very beginning, John 1:1.
All that could ever be expressed; all that was logical; all that was reasonable; all that ever could be communicated sensibly, cogently, intelligently - about anything ! - was already there, in the beginning.
God, himself, was The Word, John 1:2.
But he could not yet be revealed, as such.
First, there had to be Creation. Then there had to be humanity.
Inevitably, there must be Law, as an integral part of inhabited creation.
The consequence was unavoidable; banishment from Eden followed.
Then Israel, in order to fully express Law and fully demonstrate its consequences.
But, as the prophets prophesied, there would yet come Another. Born, he is caught up to God and to his throne, Revelation 12:5, and, in humanity, he sits on the throne of the Father, Revelation 3:21.
Magnified above all that came before - even above the prior revelation of YHWH to Israel - is the true utterance of God; the real expression of all that God would say, amar, and reveal in communicated word, emer.
For it is the Son, in Person, who reveals the Father.
He is Wisdom from everlasting.
He is The Word from the beginning.
And now he is exalted above all - above every name that is named; even the name YHWH ! which was all that could ever be communicated previously under the old covenant.
He glorifies the Father in a way that no covenant-name could ever do so.
There may be yet more in the words of the Psalmist in Psalm 138.
But this, at least, is there, I believe.