Historical criticism is very skeptical, denying anything supernatural, as a starting point. Usually scholars examine “internal evidence” to see if there are consistencies or inconsistencies. They also look at language to correlate with the custom of different historical periods.
People of faith usually look at the weight of evidence for the existence of each person. While some people are skeptical, the truth is sometimes stranger than fiction. You just can’t make up a lot of stuff in the Bible.
Personally, I put a lot of weight on the fact that someone is named in scripture. So often you gotta say that the readers/listeners did not dispute the existence of the various personages.
Obviously the story endured about an angel guarding the path back into Eden to the tree of life. Nobody question what an angel was, etc.