My family has hunted and collected Midwest artifacts for several generations. Yes, there are mounds. I grew up within a 1/4 mile from what we suspect is a mound but, has been farm fields for over 150 yrs.
Mounds yes. Stone Age evidence? Yes. Ancient highly advanced civilizations that have left no trace?? No, I don’t believe that.
This last one is probably the oldest point in our collection.
