Something interesting has been found in the beta version of WhatsApp again. It turned out that the messenger team is working on
Earlier it was reported that WhatsApp will allowusers to link an additional mobile device to their account without requiring an internet connection on the main device. Now the WABetaInfo portal says that WhatsApp is working on synchronizing chat history between mobile devices.
When users log in to WhatsApp from a secondary mobile device, they will be able to see their existing chats. The synchronization process may take some time.
Unfortunately, it is not yet known when WhatsApp plans to release this mode in a stable version, since this feature is still under development.