How do I add an idea?
Select the 'New Idea' button and choose the category that your idea belongs to, then add the idea title and the details related to the idea.* Ideas added without any details may be rejected.
I assume this is something within Instagram security, but it points to the potential Sendible feature to reach into the accounts and delete a post that has come from it. If you can send a post, why can't you send a "post delete"?