On May 1, 2018, Facebook announced new approval requirements that affect some apps that integrate with Facebook Platform APIs, including the Messenger Platform. These new requirements are in addition to the Messenger Platform's submission and review requirements.
For more information and to find out if your app submission is affected, visit the Facebook Platform app review documentation.
Once you have finished building your Messenger app, you must submit it to our team for review and approval before it can be make publicly available to everyone on Messenger. To make this process as smooth as possible, take some time to the resources below, which will walk you through everything you need to know to successfully publish your Messenger experience.