Oh please, not this nonsense again.
You don’t need to have defined every last book in the Bible (arguably this didn’t happen for the Western Church until Trent, and I never have quite figured out when the East did it) to have a Bible. As long as you have even one book that is functioning as canonical Scripture, you have a Bible. I would go further–since inspiration comes from God and does not depend on human recognition,** I’d say that you have a Bible as soon as even one document is written. **But that is something that we can debate. The view that you don’t have a Bible until every dispute about the limits of the canon is settled is simply untenable–it’s clear that parts of the NT were functioning as canonical Scripture long before that point.
Clearly the letters of Paul were functioning as Scripture by the time 2 Peter was written, and the Gospels were functioning as Scripture in the time of Papias. So at most the NT Church is no more than a century older than the New Testament. I would say that the NT Church may be no more than two or three decades older than parts of the NT, but I won’t insist on that.
Edwin