"tap twice to select a word, tap three times to select a sentence, tap four times to select a paragraph" not work properly on iphone 11 pro

This needs a bit of patience & practice.

• 
• Select a word: Double-tap the word with one finger.
• Select a sentence: Triple-tap the sentence with one finger.
• Select a paragraph: Quadruple-tap with one finger.
• Select a block of text: Touch and hold the first word in the block, then drag to the last word.
• After selecting the text you want to revise, you can type, or tap the selected text to see options.
  • Cut: Tap Cut or pinch closed with three fingers two times.
  • Copy: Tap Copy or pinch closed with three fingers.
  • Paste: Tap Paste or pinch open with three fingers.
  • Replace: View suggested replacement text, or have Siri suggest alternative text.
  • B/I/U: Format the selected text.
  • : View more options.
•