Brightness control missing from control panel

(I think it’s called the control panel—When you swipe up or double-click the home button, the menu that comes up).

there used to be an option to turn the brightness up/down and turn night shift on/off, but it’s suddenly missing. I went to my settings and tried to customize my control panel, but I dont see an option to add the brightness control.

Below is a picthre of my control panel. You can see the empty spot where the brightness once was