There are some instances where a Pro-active Whatsapp template may not send and you will see the message:
“Message failed to send because either the recipient never messaged the sender number, or more than 24 hours have passed since the recipient last replied to the sender number.”
Resolution Steps
Check whether the WhatsApp template has been approved. You can check this via your Meta Business Portal. If you have not migrated to the Meta portal then please contact our support team via the in app Help & Support > Live chat bubble to help check this for you in Sunco.
Ensure the template category is set to “Utility” in the Meta Business Portal if the message is generic rather than promotional. “Marketing” templates are currently known not to send to +1 US mobile numbers, as outlined in the referenced article.
Confirm that the template was not edited before sending—only the exact approved wording can be used, and any proactive edits will prevent delivery.