I used to just have a regular DND schedule for when I sleep, but now since iOS 15, I don't see a sleep focus option. I want it because I like to have the weather on lock screen when I wake up and its no longer show on iOS 15 on regular DND. Do I have to set up a whole sleep mode schedule in the health app to have this option? Because there's no sleep focus option when I try to create a new one.