due to the camera, the LG smartphone has a LED flash on the backside which can also be used as a flashlight. depending on the model, the brightness can vary but cannot be adjusted. the flashlight is not available as a stand-alone app, but is integrated in the system via the notification panel, where it can also be switched on or off.

Android 9 | LG UX 9.0
Flashlight -  Open the  Notification bar
Flashlight -  Open the  Quick settings
Flashlight -  Enable or Disable  Flashlight
  1. Open the Notification bar
  2. Open the Quick settings
  3. Enable or Disable Flashlight