When using Voice Assistant (TalkBack), all entered letters are read out by default. This is not the case with passwords, but if this is desired, passwords can also be pronounced.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Accessibility
Step 3:  Tap on  Screen reader
Step 4:  Open the  Settings
Step 5:  Enable or disable  Speak passwords
  1. Open the Settings
  2. Tap on Accessibility
  3. Tap on Screen reader
  4. Open the Settings
  5. Enable or disable Speak passwords

Samsung Instructions