Hi , make sure you successfully submit your app build to the App Store, that will make you leaderboard go live, when you submit your app build there should be an option to also submit your leaderboard. let me know If you have any issues. I ran into same problem. I would caution on setting up leaderboard in 5.1.1. Im having issues not being able to write to Game Center. more can be found here Unreal Engine 5.1.1 Not writing to IOS Apple Game Center Leaderboards anymore. It used to in our previous 4.27 version