I have a website I run that is focused on sportsbetting so while I know high level what is legal where, I'm not actually in Minnesota, so I don't know every single detail especially when it comes to what's allowed in person.

My guess would be that either A) that's tribal land and there's an exemption for that in the current laws or B) they have a casino, but don't offer sports betting or C) they only allow sports betting on the property by either requiring all bets to be placed in person or the app they offer is for sportsbetting is geo-fenced to their property (which is how states like WA do it)