I'm trying to get permission for instagram_manage_message using a custom inbox but we're lacking a way to delete messages we send.

I don't see any documentation about this and I already tried using the Graph API Explorer DELETE -> https://graph.facebook.com/{mid_id} with the same Access Token used for sending messages but the response is alwasy [(#10) Application does not have permission for this action]

Does anybody know how to delete a DM?

Thanks in advance