Yes, you can move to Las Vegas but unfortunately the new stadiums aren't in the game.
I start a base save file where I take over as owners of the Raiders, Rams, Chargers. I move the Raiders to Las Vegas with the deluxe futuristic stadium and rebuild the Rams and Chargers stadium to the same deluxe spherical stadium. It's not Allegiant nor Sofi stadiums but it's better than the dumps they're currently in.