In the Settings app, tap Control Center. Tap the plus icon next to the controls that you would like include in your Control Center. Tap the minus sign to remove unwanted controls. Hold and drag using the grip icon on the right to change the order of the controls.

1) Open the Settings app.

2) Tap Control Center.

3) Add desired controls by tapping the green plus (+) icon.

Remove unwanted controls by tapping the red minus (−) icon.

You can customize the order in which the controls appear in Control Center by holding and dragging the grip icon to reorder the controls.

Outcome

Control Center will contain the controls that you have designated.