Pitt and Penn State in different P5 conferences. They don’t play one another every year.
As I said with my edit, most states. Certainly its way more prevalent if there are two or more P5 teams in one state they are in the same conference. Michigan, Illinois, Indiana, Kansas, Texas, California, Washington, Arizona, Oklahoma, Oregon, Florida has FSU and Miami in the ACC, (while Florida in the SEC), North Carolina, Virginia, and Mississippi. Some states have three, Cal has four, hell Texas had FIVE teams in the same conference. I think thats it. Some exceptions Penn, Florida U, Georgia, and Iowa.