This process has two steps:
Disable two-step verification
Integrate your WhatsApp Business account and add the phone numbers
Login to your Meta Business Suite.
Choose the account from the dropdown in the top-left corner.
Click WhatsApp Manager from the navigation toolbar.
Click on Phone numbers.
Click the Settings icon beside the number you want to migrate.
Click Two-step verification, then click the Turn off two-step verification button.
Click Ok.
Click the Settings icon located on the top right of the screen.
Choose Apps under Integrations.
Under App Categories, click Instant Messaging, and then click WhatsApp
Click Connect.
You'll be prompted to login to a Facebook account. Log in with the account that is linked to your business email.
Once you log in to Meta (Facebook), you can select an existing business account or create a new one. Choose an existing business and select your business from the dropdown.
Agree to the terms and conditions by clicking Next in the respective popup.
Enter your phone number and click Next. Verify the phone number with OTP. It will be moved to Zoho Campaigns.