WhatsApp will let you manage contact syncing on Android
Briefly

The latest beta version of WhatsApp introduces a feature allowing users to manage contact syncing with multiple accounts on the same device.
With the new update, users can selectively choose which contacts to sync and manage their WhatsApp contacts more effectively across linked devices.
Even if contact syncing is disabled for a secondary WhatsApp account, users will still have the option to manually sync contacts for all linked devices.
A new contact backup feature will be included in the upcoming release, enabling users to restore contacts if they reinstall WhatsApp.
Read at GSMArena.com
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