I’d say Genesis is teaching us of our origins…How we got here, which instructs us in who we are and who is God. Origins can be described from multiple points of view (including scientific and historical). I’d say Genesis 1 was given to be understood through the ages, both in the original context and into our time. There is a timeless quality to it, which is why I resist mapping it too closely to scientific claims (which are bound to our moment).
You are right. It does seem to take that view. Though I am not sure exactly what the theological reflection could be upon if not an account of origins.