“You usually do this when you are losing the argument. You put words in my mouth and run with it. I’m not playing that game this time.”
You mentioned codexes. Which was the first codex published with the NT Canon in the modern form?
“Which was the first codex published with the NT Canon in the modern form?”
As has already been answered: The first collection of the New Testament would have been published by the Apostles, with copies being made and gathered by the church, as already previously argued, and as evidenced in their widescale availability seen with the early Christians in the latter 1st and early 2nd century. Unless there is a difference in the scripture between then and what is now “modern,” regardless of whether it appeared in a book, or in rolled up scrolls, then the “first... published” date is as already specified.