Your version I am not familiar with
And in one Lord Jesus Christ, the only-begotten Son of God, begotten of the Father before all worlds, God of God, Light of Light, Very God of Very God, begotten, not made, being of one substance with the Father by whom all things were made;
This is the one I am more familiar with.
We believe in one Lord, Jesus Christ,
the only Son of God,
eternally begotten of the Father,
God from God, Light from Light,
true God from true God,
begotten, not made,
of one Being with the Father
Through him all things were made.
It doesn’t matter to your question because they say the same thing. In both version it modifies Father. So the answer to your question is that it refers to God the Father who is the creator as it states at the begining of the Creed.
We believe in one God,
the Father, the Almighty,
maker of heaven and earth,
of all that is, seen and unseen.
It also often says “through whom all things were made”. I know that all things were made through Christ as it says in John1.
Would you please give me the exact verse? I