The Earliest manuscripts dates the book of Revelation to the end of emperor Domitian’s reign (AD 81–96), most modern scholars agree the first version was written under Vespasian (AD 69–79) and updated under Domitian.
The Rylands Library Papyrus is a Greek papyrus fragment that has John 18:31–33 on one side and John 18:37–38 on the other, which is dated to 30–45 AD.
The text is also written in a revealing way,The Gospel of John is written in perfect Koine Greek, while Revelation is written in a manner reflecting the age of John, not as pristine in form and style, which supports the evidence of a more aged writer.
All the archeological support dates Revelation being written AFTER John.