metaAds.onInstagramMessageDeleted starts when someone removes a direct message they sent to a selected Instagram professional account.
automations/meta-ads-on-instagram-message-deleted.automation.ts
instagramAccountId with List Instagram accounts. Meta requires apps to delete stored copies of a message when the person removes it. Use messageId to remove the message wherever your automation saved it from On Instagram message received. Optional account selects a static project account binding.
The event includes instagramAccountId, messageId, senderId, the person’s Instagram-scoped ID, and timestamp in Unix milliseconds. Each messageId starts at most one run. The trigger needs the same permissions and account setup as On Instagram message received.