Apple really dropped the ball with its Screen Time feature. Instead of allowing users to limit time spent using an individual app or game, Screen Time only allows users to set daily time limits for app categories. This means parents can't limit how long their children play Fortnite or use Snapchat.
While Screen Time is very useful for monitoring how much you use your iPhone or iPad, it is pretty useless where it should have counted mos. Screen Time should have given iOS users the ability to limit time spent on individual apps/games, and the ability to set specific times when apps could be accessed, like after school hours. What's the point of knowing your screen time breakdown if you can't do much with that knowledge?