I'm not sure the Red Bull situation is applicable to anyone else. RB Leipzig aren't controlled directly by Red Bull due to the 50+1 rule. They're technically a membership association that happens to be funded by Red Bull. It's just that all the members are Red Bull employees. That's how they get around UEFA dual ownership restrictions.Ah but according to UEFA they're named RasenBallsport Leipzig and FC Salzburg. So of course they're no connection with each other
Rasenballsport isn't even a real word, it translates as grass ball sport and neither football nor any other game was ever called that before Red Bull invented it so they could call the club RB.
There are plenty of other people who own multiple Football clubs, such as City and the Watford owners. Not sure any of them own two clubs that regularly qualify for Europe.