Depending on the model, the camera can take photos in different resolutions, and the camera resolution affects not only the number of pixels but also the image format.

Android 9 | LG UX 9.0
Step 1:  Open the  Camera -App
Step 2:  Open the  Settings
Step 3:  Tap on  Picture Resolution
Step 4:  Choose desired  Format/Resolution
  1. Open the Camera-App
  2. Open the Settings
  3. Tap on Picture Resolution
  4. Choose desired Format/Resolution

LG Instructions