There are several small tasks that need to be performed, contracts that must be accepted, and descriptions and images that you should add in order to publish your app to the App Store. For a high-level overview of the workflow, see the official Apple guide at https://help.apple.com/app-store-connect/#/dev300c2c5bf.
For this chapter, we are using fastlane for the publishing process. There are also other alternatives, including Codemagic at https://flutterci.com/ and App Center at https://appcenter.ms/.