They are biological humans. I also make a case they have human dignity and worth, and are loved by God. They just are not the focus of Scripture. This makes sense because by the time Scripture is recieved their theological class doesn’t exist any more. There is no reason for them to appear as more than just the backstory and peripheral vision.
They are fully human, just not the subject of Scripture. No need to feel sorry for them for this reason. Cain’s wife, for example, appears in peripheral vision. That serves to make the point, not trouble it.