You can simply Google this yourself. Most experts in the New Testament and the gospels date the compositions 40-60 years after the death of Jesus.
I also cringe when people insist that the gospels are not eyewitness accounts. Matthew and John were Apostles,
Paul says “Jesus appeared to me” - firsthand eyewitness claim. Now find me a passage in Matthew and John where they write in the first person saying “I saw Jesus” and then describe what they saw. You’ll notice the accounts are written in third person. Matthew never claims to be an eyewitness and John only has anonymous attribution - “We know his testimony is true.” This is hardly evidence. A lot of the apocryphal gospels were claimed to have been written by eyewitnesses too. This trend of falsely claiming eyewitness authorship had to start somewhere. Why not with John?
Mark was Peter’s scribe,
Does the gospel of Mark actually say that?
Luke was a scientist seeking facts within a relatively short historical period.
Read the gospel. The author nowhere identifies who he is or his credentials.
Jesus walked the earth for 40 days prior to transfiguration.
That claim is only in Acts right?
Paul’s encounter was with the transfigured Christ and was not the first encounter.
Never said it was the first encounter. The point was he doesn’t distinguish his “vision” of Jesus from the other “appearances” so we have an inference they were visions too.
Much of what you present is not biblically accurate, publishing dates rarely reflect a chronological account of events.
Likewise, if the stories were all published by anonymous authors who do not cite their sources after 70 CE then there is no evidence the stories existed prior to that time period or that they actually go back to historical events.
Relying on “scholarly” efforts of non-believers also rarely reveals any truth.
Plenty of Christian scholars date all the gospels after 70 CE.