Meta Conversions API, no app review
You wanted your sales in Meta server-side, and the only route was an app waiting on Meta's App Review. Meanwhile your campaigns optimised on whatever the browser pixel managed to see.
The enemy is waiting on Meta to approve something before you can report a sale.
There is now a direct Meta Conversions API integration. Paste a pixel (dataset) ID and a system-user access token, and purchases go to Meta from our servers, with customer data hashed and the click cookies attached. No app, no review. If an affiliate already reported a sale to the same pixel, it is not sent twice.
Try it: add the Meta Conversions API integration with a test event code, place a test order, and watch it land in Events Manager.