WhatsApp has rolled out a new feature that allows users to link an email address with their accounts. This feature offers users the flexibility of receiving OTP verification codes via email when SMS delivery is not possible. The feature is now available on iPhone and in the latest beta version on Android. Android users can enroll in the WhatsApp Beta program to access the beta version. To link an email address, users need to navigate to the settings menu, choose the "Accounts" option, select the "Email address" option, enter the email address, and verify it with the received OTP.

source https://www.gadgetsnow.com/how-to/how-to-link-email-address-with-your-whatsapp-account/articleshow/105454103.cms