I wonder if you could re-visit why the initial impetus to have a literal Adam and Eve, but to place them about 9,000 to 7,000 years earlier than the traditional 6,000 years ago.
I assume you hope to find a way of fitting the Biblical narrative into a timeline that better fits the physical evidence.
If this is not too off-based an assumption, the main @swamidass scenario has an “evolved humanity” that leads up to 15kya, and right on through into the “Biblical Age”. This would fit the conventional timeline that historians present for the beginnings of irrigation and other agricultural related activities.
Since we are not treating the 15kya time frame as an orphan, it becomes less crucial to have Adam & Eve placed there as well. In fact, there are certain advantages to placing God’s “Garden Laboratory” (aka Eden) in the chronology where most Evangelical interpretations place them: 6000 years ago.
Since the human population is “busy as bees” long before Adam and Eve make their appearance (via special creation), and we don’t have to rely on Adam and Eve to provide all the manpower for the finds we have already identified, the “miraculous pair” can conveniently slide most anywhere in the timeline.
That being said, we anticipate more Evangelical support for putting the pair where they have already put them. And since the scenario is embracing both the evolutionary side and the miraculous side of human development, nothing is being ignored, and we expect the least amount of “friction” by not requiring Adam & Eve’s presence to explain human artifacts prior to 4000 BCE (6000 years ago).
For example, the Genesis descriptions don’t really mention anything about a fading cold spell that would suggest the dwindling away of the Ice Age climate effects (per your good graphic you include in your post above). So we can, without any guilt, let the pre-adams suffer those cold crisp nights - - with the anticipation that Adam and Eve are created in a more temperate context.
Following this logic - - and seeing that we have a population of at least 10,000 humans by 15kya - - does your version of events suffer much if we slide the “Adam/Eve” epoch into the 6kya time frame?