3 Steps to migrate to the WhatsApp API:
/v1/configs/webhook and store url address from response.
/v1/configs/webhook with your webhook endpoint:
Webooks will be sent as described in WhatsApp Business API
Switch to use new WhatsApp API instead of current API.
Please remember that WhatsApp API calls are compatible with WhatsApp Business API and are not backward compatible with previous API version.
Configs Messaging & Conversations v1 API (old) → No longer valid.
In case a revert will be needed:
Just switch the webhook to the previously saved url via POST
/v1/settings/webhook (Set webhook url). And revert your system to use old API version.