The point is it is talking about who he is an image of there correct?
This is TS2009 translation:
Heb1:
3 who being the brightness of the esteem and
the exact representation of His substance, and sustaining all by the word of His power, having made a cleansing of our sins through Himself, sat down at the right hand.
This is the Aramaic Peshitta translation:
Heb 1:3
3 He is the radiance of his glory,
the very image of his substance, and upholding all things by the word of his power, when he had made purification for sins, sat down on the right hand of the Majesty on high;
KJV translation of this verse is erroneous; which says '
Express image of His PERSON'
There is no 'Person' there. This wrongly used 'Person' is the cause of various theological schools in Christendom. This error makes Transcendent God a Person and the very image of His substance another Person. This is the foundational error in Christendom in its various forms of 'isms'.
The very image doesn't mean He is a created being. It means that He expresses the One and Only God in Bodily form that is tangible.
It's God Who transitioned Himself from Unknown and invisible substance to be known tangible as was witnessed by the Apostles to us and thereafter will be seen as The Everlasting Father in New Creation (the age to come).
Who appeared to the OT prophets in form of a Man? The same Yahuah Who became Yahusha in the NT as The Firstborn over all creatures (His elect). That's why His birth was supernatural without DNA of earthy father (Adam) but of the substance of transcendent God.
Gen 3:
8 And they heard the
voice of יהוה Elohim walking about in the garden in the cool of the day, and Aḏam and his wife hid themselves from the
presence of יהוה Elohim among the trees of the garden.
Exod 15:
3 “
יהוה is a man of battle, יהוה is His Name.
Exod 24:
10 And
they saw the God of Israel: and
there was under his feet as it were a paved work of a sapphire stone, and as
it were the body of heaven in
his clearness.
In Hebrews 4:12, The Word of God is called the double edged sword ( in original form it's double mouthed). Two mouths related to the same Person Who spoke to the prophets in the OT and as a witness to His Disciples in the NT.
G1366 'distomos' from G1364 'Dis' meaning twice and G4790 'Stoma' which means mouth.
Rev 1:
16 And in His right hand He held seven stars, and
out of His mouth went a sharp two-edged sword, and His face was as the sun shining in its strength.
He is The First and The Last (The First Estate of His Being and The Last Estate of His Being) reference Isaiah 44:6.
IOW, God Who is the Creator took part of His own creation as The Son to adopt us into His family as sons and to be The Everlasting Father in the New Creation (age to come).
Rev 21:
6 And He said to me, “It is done! I am the ’Aleph’ and the ‘Taw’, the Beginning and the End.
To the one who thirsts I shall give of the fountain of the water of life without payment.(See John 7:37)
7 “The one who overcomes shall inherit all this,
and I shall
be his Elohim and he shall be My son.
V6 above has a reference to John 7:37:
Now on the last and greatest day of the feast, Yeshua stood and said in a loud voice, “
If anyone is thirsty, let him come to me and drink.