Genesis chapters 3-11 contain multiple passages to support the position, along with passages in Romans, 1 Corinthians, and Hebrews. It is seeded throughout the Bible.
I refer you back to the videos in this link, the first of which you once described as “the heart of Genealogical Adam”, and it is as far as showing that the scriptures point to a population outside the garden which was already around when Adam and Eve came along.