“WhatsApp is currently in the testing phase for a new feature that will enable users to log in using their email address, offering an alternative authentication method apart from the existing phone number login. This update is being rolled out for both iOS and Android smartphone users, allowing them to link their email addresses to their WhatsApp accounts.
The email login option proves to be valuable, especially for individuals traveling without an international mobile plan, as it provides an alternative means of accessing their WhatsApp accounts. In the latest beta versions of WhatsApp (iOS 188.8.131.52 and Android 184.108.40.206), users can enter their email addresses and complete the verification process, which offers them a new way to access their accounts.
Furthermore, WhatsApp assures users that their provided email addresses will remain confidential and will not be visible to other users.”