When using the VMware Aria Operations Federation Management Pack (Aggregator),
VMware Aria Operations 8.18.x
This behavior is expected by design. Custom content including dashboards, views, and reports created within a specific child instance is stored locally within that child environment. This data does not propagate or synchronize to the aggregator instance, as this is designed to aggregate metrics and health data rather than local configuration objects or custom UI content.
To view aggregated data across multiple child environments, utilize the native capabilities of the Aggregator Management Pack rather than relying on child-specific custom content.
Reference: Aggregator Dashboard