I always get confused about the term “Church Fathers.” If that means the Apostles, they had only the “Old Testament,” they didn’t write anything themselves, except letters back and forth to each other. At some point four guys sat down and wrote what they remembered, plus Acts. Then somebody decided the letters and memoirs constituted “scripture.”
God said to Moses, “Write this down.” Jesus never said to anybody during his earthly sojourn, “Write this down.” It just seems kinda strange.
We still know not what we do.
Peter called Paul’s writings scripture. John was told what to write in Revelation. Add that to the consistent admonition by God (which includes Jesus) to write down what He told them just when do you think God changed His mind about writing it down?
Matthew was an apostle. John was an apostle. Mark was a disciple described in one of the Passion accounts as the young man who ran off naked. Luke traveled with Paul and talked with the Blessed Virgin Mary as he painted her portrait.
You are missing a lot.