The AddressBook plugin is deprecated for a few years and it looks like finally Apple put it on the no-go list for the App Store. At least we got such a notice for the ABPersonView control in one fo the applications of a client. This is one of the controls we provide for address book access.
We already marked AddressBook functions as deprecated, but it may be finally time for you to look through your code and remove all references to AB* classes:
Let us know if you have questions on the transition to Contacts framework or if something is missing in our plugins.
For MBS Xojo Plugins we plan to remove AddressBook completely in a cleanup in winter, so 2022 versions may no longer have it. Because if Apple starts to flag those classes as no longer being eligible for App Store submission, it's time to say goodbye.