We are updating the order status from external system directly on the database and it works fine for presentation purposes. However, Magento does not recognise the order status change to trigger relevant emails.
So the questions are:
Is there a way to 'tell' Magento that an order status changed and to process the change as normal (triggering the email as normal) ? No REST API known to us.
If not, should we be implementing a custom REST API end-point to trigger the email to be sent (even if that means statuses and email templates relations are stored elsewhere) ?