Currently, there's no option to get a report of the current subcatalog admins other than to go to the Subcatalog Admins page in the Admin Dashboard, and copy/paste the list. We are beginning to see our list get longer as more users create more subcatalogs and add admins.
While it would also be great to have an API call for this (which I would want as a solution too as that would help automate generating reports), perhaps a simple update of the UI of the Subcatalog Admins page can include an Export CSV. This would allow a root admin to easily get a list of all subcatalog admins when needed.
