First of all congratulations to Luke.
Dayton is a member of the Pioneer League and offers need-based and academic scholarships that are available for football student-athletes. Morehead State is also a member of the league. "Following an NCAA rule change passed in January 1991, which required Division I schools to conduct all sports at the Division I level by 1993, the conference was formed by charter members Butler University, the University of Dayton, Drake University, the University of Evansville, and Valparaiso University."
https://en.wikipedia.org/wiki/Pioneer_Football_LeagueSo in reality, Dayton and Morehead State and the other members of the Pioneer are really a D3 level programs in football since they don't offer football scholarships.
I couldn't find any other colleges offering Luke a football scholarship with a quick internet check. Maybe others might find some information on his college offers? If Luke is considered a better QB than Cole, I wouldn't be surprised to see Cole transfer down to a lower level program. Nothing against Cole, but Marshall is signing high school and portal QB looking for a player who can turn the program around.