Magnolia Promenade Sims 4

I’ve had get to work for a while now. And I don’t even know that it came with a new world, Magnolia Promenade because it has never even shown up in my game before. Only from watching someone play on YT did I realise it came with a world. So I’m wondering, where is it? And how do I get it as it’s just not part of my game!