Very few LG smartphones have an optical zoom, but every device has a digital zoom, which can be operated by wiping two fingers apart.

Android 9 | LG UX 9.0
Step 1:  Open the  Camera -App
Step 2:  Pull two fingers apart to  zoom in
Step 3:  Pull two fingers together to  zoom out
  1. Open the Camera-App
  2. Pull two fingers apart to zoom in
  3. Pull two fingers together to zoom out

LG Instructions
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