Revelation certainly wasn't.
Further even if all were written you've done squat to assert St Paul was intimately familiar with each and that the churches he was writing to had a collection of all of them. (History asserts they most likely had one or two at best).
Nevertheless, the synoptics, Acts, and Paul's letters comprise the bulk of the NT.
I think Paul asks for his manuscripts to be brought at the end of Colossians and he asks for churches to read one another his letters because there was more already written at that time than we're admitting.
"Further even if all were written you've done squat to assert St Paul was intimately familiar with each and that the churches he was writing to had a collection of all of them."
Tradition says it's so.