Yo, Rosie, good to hear from you.
But don't you think something like the creation narratives are beyond historical truth claims?

hope you good Akita
In what sense do you mean, that they are more than history? Yes, they are theological narratives rooted in history and prophetically symbolic. God reveals Himself through these narratives, firstly to Israel as the Creator God and then to us. It's part of their history in their context.
One would have to be supposing divine revelation to the author. And, of course, many do, literally. I just don't see it with Genesis I & II.
The fact that they are theological in nature attests to their divine inspiration. God, as divine source impacts human authors ie (both divine and human). God working through the personality, the style, and more, of the human authors to bring about theological truth.
The Genesis narratives are a self revelation of who God is (Creator), and who we are in relation to Him (creature) not merely a text book for scientist.
The authority of these claims rests on its divine inspiration. There has been sufficient scholarly support mentioned in this thread to this effect.
In addition, Writing "God said"..., is not something I understand those associated with an ancient text would take lightly. (Prophecy was a serious claim)
As Scripture, the Genesis accounts hold divine authority which Paul referenced when encouraging Timothy.
Faith in God's self revelation of who He is as Creator God is also brought about by Scripture (including Genesis) and its divine authority. It's the origins of our faith which the writer of Hebrews alludes to (Hebrews 11:3).
Beyond that there certainly can be historical roots in characters and stories. As I said before, I do not require it for my appreciation of those characters and stories.
For me it's much more than an appreciation, it's an acknowledgement and coming in agreement that the God of heaven an earth, who is beyond time and space, condescended to human history to reveal Himself. Firstly through those who revealed his Word in thought, in script and action (prophets), but finally through His son (Jesus) (Hebrews 1:1-2).
The condescension is seen in the literary creation elements of Genesis. For me, Genesis is much more than a story, it reveals how God created spaces and filled it. The sky for birds, the seas for fish, the land for animals, but the final filling is when He created humanity and filled it with Himself (His breath, ruach, Spirit). That truth alone, is humbling and awe inspiring. His Creation was complete when He rested within humanity. If this is not a Divine injunction then I don't know.