post https://api.YourRegion.webexconnect.io/resources/v1/messaging/
Messages for Business Forms allow you to create rich, multipage interactive flows for users on iOS and iPadOS devices. Note: Modify YourRegion in the URL to the right to reflect your tenant’s region. See know your endpoint page.
Error Codes
Refer to the below page https://developers.imiconnect.io/reference/channel-specific-status-codes-1#apple-messages-for-business