App Store Connect API: how to “Developer Reject” submission after review has started

The App Store Connect API has an endpoint to delete a submission (to "Developer Reject" it):

Code Block
DELETE https://api.appstoreconnect.apple.com/v1/appStoreVersionSubmissions/{id}


This endpoint doesn't work once the submission enters review (or has been approved), as noted in the docs:

Use this endpoint to remove a version from App Review if the review hasn’t yet started. This request fails with an appropriate error if the app is already in review.

I can't seem to find any way to "Developer Reject" after review has started - am I missing an endpoint in the ASC API (or perhaps even some fastlane action) that allows you to do this??

Note that you can definitely take this action via the UI - once your submission is in review or approved, there's a banner with a "cancel this release" CTA lands you back in a "Developer Rejected" state as expected.

Thanks in advance for any guidance!!
App Store Connect API: how to “Developer Reject” submission after review has started
 
 
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