Limitations of Managed Dashboards

Editing - You cannot modify widget configurations, add new widgets, remove widgets, or change the dashboard layout permanently.

Deleting - You cannot delete Managed Dashboards. They are maintained by AWS and always available in your dashboard list.

Sharing - You cannot share Managed Dashboards with other accounts. They are already available in every account automatically.

Tagging - You cannot add tags to Managed Dashboards.

Scheduling email delivery - You cannot schedule email delivery directly on a Managed Dashboard. To schedule reports, duplicate the Managed Dashboard as a custom dashboard first, then configure the scheduled report on your custom copy.