WhatsApp has been working on disappearing messages and under testing now.
Through this latest feature, messages received through individuals or groups will be deleted automatically after 7 days.
However, according to WABetaInfo, the disappearing messages feature on WhatsApp is under testing and there’s no available information on when it will go official to general users.
As of this reporting, the disappearing messages feature on WhatsApp seems to be in the initial phases of development. When it releases, it is expected to be available for both Android and iOS platforms, and maybe for KaiOS as well.
Sources: Indian Express.com