Removing an unwanted icon.
I have an icon that looks like a black square with a white circle in the center. It can be moved to any edge on the screen but it doesn’t jiggle when touching it and so it won’t let me remove it. When opened it has selections for the control center, device, home, Siri and notifications. It stays on every screen is often in the way and dims while not used. Any suggestions on how remove it?
iPad