When touching the LG keyboard, an input sound can be played and the keyboard sound can be turned on or off in both the sound settings and the keyboard setting.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  Sound
Step 3:  Enable or Disable  LG Keyboard sound
  1. Open the Settings
  2. Tap on Sound
  3. Enable or Disable LG Keyboard sound

LG Instructions
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