I think it's very likely that they play a kickoff classic type of game or games at the new stadium. However, with BYU, that wouldn't shock me if they play a "home" game at the stadium once every few years. Not including the Raiders, I think the new stadium is likely to host 10 or more college football games per year.
https://www.google.com/amp/www.azde...s-moved-new-las-vegas-oakland-raiders-stadium
https://www.google.com/amp/www.azde...s-moved-new-las-vegas-oakland-raiders-stadium