The states began as independent nations with full sovereignty. In US history authority starts at the bottom ~ where the People are ~ and flows up ~ where it is constrained by constitutions.
Actually, they didn’t. The First 13 did because of the framework of the Confederacy.
Minnesota doesn’t. Didn’t need it with the BoR right there. States can grant additional protection and additional “Rights” for the people in their State... But the BoR is the minimum for us all.