So you consider the Old Testament (written before the Church) not part of the Bible?
Jesus and the Apostles quoted regularly from it.
In addition, the NT Scriptures were around well before they were bound together. They were anointed Scripture when written in the 1st century AD.
The oral word preceded the written, and the apostles provided the authoritative interpretation of the Old Testament. Which, BTW, included the books of the Maccabees, Judith, Tobit, etc.
What was scripture and what wasn’t scripture wasn’t settled for 300 years. The Word of God is part written and part unwritten.
I think any reading of the early fathers of the Church will demonstrate that the common Evangelical reading of the Bible would have been foreign to the early Christians.