Instead of tapping on the dot, you can also set a punctuation mark by tapping the space bar twice. Auto Punctuation is enabled on the LG smartphone at the factory and can be disabled at any time.

Android 9 | LG UX 9.0
Auto punctuate -  Open the  Settings
Auto punctuate -  Tap on  General
Auto punctuate -  Tap on  Language & keyboard
Auto punctuate -  Tap on  On-screen keyboard
Auto punctuate -  Tap on  LG Keyboard
Auto punctuate -  Tap on  Additional settings
Auto punctuate -  Enable or Disable  Auto-punctuation
  1. Open the Settings
  2. Tap on General
  3. Tap on Language & keyboard
  4. Tap on On-screen keyboard
  5. Tap on LG Keyboard
  6. Tap on Additional settings
  7. Enable or Disable Auto-punctuation

LG Instructions