Inspired by a comment thread from Unmanaged Muted - Report Lab - The Orion Platform - THWACK (solarwinds.com)
This is a custom query that can be put on a global summary page to show all devices which have been unmanaged or muted based AND match a specific filter.
Raw Results:

As rendered on a Summary Page:

Custom Properties Required:
- Orion Nodes / AuditCategory [string]