Whatsapp Message Template Using Meta Business Suite - Facebook Business
- Create New Developer App - Meta For Developers
https://developers.facebook.com/apps - Add Privacy Policy URL
- Change App Mode to Live
- Create WhatsApp Message Template -https://business.facebook.com/wa/manage/message-templates
- Create System User
https://business.facebook.com/settings/system-users - Assign Permissions of WhatsApp Accounts operations to System User
https://business.facebook.com/settings/whatsapp-business-accounts - Generate User Access Token
https://developers.facebook.com/tools/explorer/
Also, advanced integration is possible with whatsapp embedded signup