Torch light

The Flash Light/Torch is in your Control Center

Steps

1. Swipe up your Control Center
2. You will see these icons

The bottom most left icon is the Flashlight/Torch light

3. If it is not Present then go to Settings -> Control Center -> Customize Controls (Here you will find a list of widgets to Add/Remove)

Swipe up from the bottom of the screen to get the Control Center. Long press on the flashlight icon to turn on the light.