Only App Store Connect users with a Legal or Admin role now have the ability to remove and restore apps. Apps can’t be removed if they are part of a Game Center group, in an app bundle, or currently available on the App Store. An app cannot be removed if its actively being transferred to another provider.
Additionally your app must be in one of the following states:
An approved app may not be restored if the name of the app is no longer available. If you believe an app is preventing you from using your trademark as an app name on the App Store, you can submit a claim to the App Store Legal Team.