The teaching of the Church is that No part of Genesis, or in fact no part of the pentatuech is required to be interpreted as “literal history” in the way a lay person would Concieve of such an idea.
However it all contains the TRUTH as received from the long process of authorship which gave us the OldTestament which was not compiled into its final form and defined as canonical in the 4th century AD.
The Book of Genesis presents us with a prologue to the book of Exodus which presents a reinterpretation and retelling of a wide range of stories about the creation of the universe and pre history of Man.
We learn of the origins of the Semetic people’s and the origins of Israelites as one group of these people in a format of retelling and reinterpretation of the oral historys and written histories of various branches of those peoples who came to become a single nation after the time of the exodus.
The books of Gen and Ex were formed into their current form around the time of the return from exile. … about half a millenium BC.
However in adding this it is important to understand that even today there is no such thing as “literal history” human memory is very fallible and the whole point of recorded history is to sign meanings and importance to events deemed to be significant.
Such interpretations are by necessity subjective and determined by ones point of view.
The importance of Genesis is that it tells us the significance of Creatuon as the act of a living God. The impedance of the Covenants with Adam, Noah, Abraham, Isac as pre figuring the covenant with Moses and ultimately leading to the New Covenant.
However the events are recorded and interpreted for a people’s who did not share or understanding of"literal truth" as we would imagine a flying stealth spy camera mot have recorded.
There is clear evidence of confusion about the details of some of the events. … e.g were the 10 commandments given at a mountain in Sinai or on Mt Horeb. Both are stated in different locations.
Was the Exodus the result of a group escaping or a group expelled? .
There is evidence in scripture and elsewhere of both occurring!
There was a short period when a Semite dynasty rose to power. Not just as the Pharohs 1st minister but a Semite Pharoh.
It is acceptor to conclude that this person may have been the "real"Joseph
These semites we then mostly expelled and driven from Egypt. They settled in the land now called pallestine.
Later there were Semite slaves. It is reasonable to believe that it was a group of these led out of Egypt by Moses.
There is evidence that there were so me Semite in the promised land before the military conquests described in Judges. It is possible they joined forces with their brothers coming into the land from Transjordan and their histories were merged in the development of the Torah some 1000 years later when it was compiled into is current firm in Exile and later under Esdras on turn from exile. …
The truth in these books less in the meaning of the events described. Not in whether the details of those events were what a time traveler would be able to witness.