The Show typing indicators lets the conversation or chat partner know that we are writing or typing on the OnePlus smartphone, similar to the WhatsApp Messenger.

If desired, this function can be disabled at any time, for example if the pressure to write a quick reply is too great.

Android 10 | OxygenOS 10.0
Step 1:  Open the  Messages app
Step 2:  Open the  menu
Step 3:  Open the  Settings
Step 4:  Tap on  Chat features
Step 5:  Enable or disable  Show typing indicators
  1. Open the Messages app
  2. Open the menu
  3. Open the Settings
  4. Tap on Chat features
  5. Enable or disable Show typing indicators

OnePlus Instructions