Chrome Browser defaults to the search engine selected when you first set up your LG phone, and you can change the default search engine later.

Available for selection:

Android 9 | LG UX 9.0
Step 1:  Open the  Chrome  Browser
Step 2:  Open the  Menu
Step 3:  Open the  Settings
Step 4:  Tap on  Search engine
Step 5:  Choose desired  Search engine
  1. Open the Chrome Browser
  2. Open the Menu
  3. Open the Settings
  4. Tap on Search engine
  5. Choose desired Search engine

LG Instructions