Trivia is different than it was in 2k18 for this. You have to be in the neighborhood and find out what time trivia starts. It will tell you when you first go to the neighborhood. You must then pull up your in game phone and click on the xtrivia app when it is time. Be careful, it starts promptly at the given time. There’s no waiting a few minutes after the given time. Anyways correctly answer a question and it will pop.