It would be more streamlined to let partners and developers building apps to submit those apps for publishing to the App Store directly from Front. I envision a tab in your developer app that lets you upload files and create your integration listing, then a button that lets you preview and submit your listing. Front could then review the submission, make or suggest changes, and publish the app to the App Store.
After publishing, it would be great if partners could make changes to the app in a draft state, then submit those pending changes for publication to the Front team in the same way.