According to WABetaInfo, This feature is still running. WhatsApp has been made part of the Android beta app 2.19.3. This feature will be disabled by default.
“As well as working on iOS Face ID and TouchID authentication, WhatsApp is preparing to make this feature part of Android. Fingerprint authentication will be available on this platform,” the report said.
The fingerprint authentication feature will be available in the app under Settings> Accounts> Privacy.
Once the fingerprint feature is enabled, it will be very difficult for another person to see your WhatsApp. If seen, phones that are already protected by fingerprint authentication. This feature does not seem to be very useful for them.
The report states, “Users will need to identify them in order to open WhatsApp (from app icons, notifications and external pickers). This will protect the entire application.
The report says that this feature will be available in the future for future Android users who use Android Marshmallow or any Android version of the phone.