You created a dashboard that uses a List of VMs to show given performance metrics. When you go to select multiple VMs (VM-1, VM-2, VM-3, VM-4 as shown in the screenshot), you only see the result for the first VM.
Aria Operations 8.18.x
Currently, the View widget can only display data for one object at a time when it receives data from an Object List Widget.
This is an expected product behavior. You can submit a feature request through Aha!