Perhaps this recent article (I think it’s recent) … will give you a nice summary of the “alternatives” that are being considered at BioLogos, when a writer is interested in either the special creation of Adam & Eve (amongst pre-Adamite humans) … or the Special Recognition of Adam & Eve (within a larger population of humans):
Traditional de novo view
"In one traditional view, Adam and Eve were created de novo—they were created by God as fully formed humans (Homo sapiens), roughly 6,000 to 10,000 years ago. God made them quickly and completely as fully formed humans with no biological ancestors. In this traditional de novo view, Adam and Eve are “sole progenitors”: they were the first two humans, and they alone gave rise to all other humans. The Genesis account is taken to be a record of real events similar to the way a journalist would record them today."
"However, some features in the biblical text suggest that there are other layers of meaning that this traditional view does not account for. Genesis 4 refers to other people (in cities, Cain’s wife) who do not seem to be descended from Adam and Eve…"
"When multiple interpretations of Scripture are possible, the church can benefit from considering what God has revealed in the natural world, because a proper interpretation of Scripture will not conflict with what we find there. At BioLogos, we are persuaded by the scientific evidence that human beings evolved, sharing common ancestors with all other life on earth. Furthermore, it increasingly appears that the genetic diversity among humans today could not have come from just two individuals in the past, but a population of thousands."
"Traditional interpretations of Scripture should not be lightly dismissed, but neither is it responsible to ignore or dismiss the results of scientific inquiry simply because they conflict with traditional interpretations."
Other Options for Understanding Adam and Eve
There are several options open to those who desire to remain faithful to Scripture and take science seriously.
"Some Christian leaders (such as Billy Graham) are open to models that see evolution as compatible with Adam and Eve as real historical people. In one version, John Stott suggests that God entered into a special relationship with a pair of ancient historical representatives of humanity about 200,000 years ago in Africa. Genesis retells this historical event using cultural terms that the Hebrews in the ancient Near East could understand."
"In another version (defended by Denis Alexander) Adam and Eve are recent historical representatives, living perhaps 6000 years ago in the ancient Near East rather than Africa. By this time humans had already dispersed throughout the earth. God then revealed himself specially to a pair of farmers we know as Adam and Eve—real people whom God chose as spiritual “recent representatives” for all humanity."
The above quotes from this article: