Online I came across the comment "Almost all historian's believe that none of the writers of the gospel were written by the named individuals." The person went on to comment how also... "None of the disciples, first-hand or second-hand, contributed to any of the new testament"...
(I might be confusing apostles and disciples, I get confused with that)

I guess I always thought, the writers were possibly interviewing the apostles/disciples, observing their preaching, and writing their stories.

I guess because I am not well-verse in the actual theology/histology of Christian, I went down a rabbit hole of trying to understand who were the writers of the New Testament that actually witnessed or knew Jesus or the theories of how close the source of the writing's were to Jesus and his circle.

Or was this all just randomly written 60 years later, and passed down like a wise tale

I'm sure the answer is way more complicated than my question... my head's spinning just after researching for a couple hours