View Once Voice Notes
This feature allows you to send a voice message that the recipient can only listen to once. Here are the steps to send view once voice note.
Open an individual or group chat in WhatsApp.
Tap the microphone icon to start recording a voice note.
Swipe up to lock the recording in view once mode.
Tap and hold the record button to begin recording your voice message.
When the send button turns green, it indicates that you're sending the voice note in view once mode.