At default logging levels, Cleanup Policies do not log details about what they delete. Only high level summaries are logged.
Deletes are destructive. Deletes using other means ( direct UI or REST API deletes ) are logged at default levels.
An administrator should be able to examine some log retroactively to determine what has been deleted from repository manager.
Specific components and assets deleted by cleanup policies should be logged at default levels to the "Cleanup service" task log.