Without any previous announcement from the manufacturer, the latest version of WhatsApp for Apple's smartphones has added the biometric security activation option, depending on the model used and the preferences of each user, according to News.ro.
Older iPhone models can be secured by fingerprint scanning, and smartphone users in the past two years can choose between fingerprint and facial scanning.
The new option can be enabled via Settings - Account - Privacy - Screen Lock. Once enabled, the user will be prompted to authenticate by the method you choose when opening the application.
WhatsApp will require biometric authentication even if the user did the same while unlocking the phone. This is, in fact, the role of the new option, which is intended to represent an extra layer of security.
Interaction with notifications and response to those calls or calls through WhatsApp can still be done without biometric authentication, even if the new option has been enabled.
Officially, it is not known to launch this option on Android, but there is information from sources that say it is currently working and is due to be introduced through a future update.