Custom groups automatically filter out results from objects that are not in a Collecting state.
Resolution
This is expected behavior in vRealize Operations Manager 6.x and later.
Workaround: To report against objects that are in a Not Collecting or Not Existing state, run the report against a different Parent Object type that includes the desired objects as Children.
Example: To report on Virtual Machines that are in a Not Collecting or Not Existing state, run the report at the vSphere World, vCenter, Datacenter, or Host level.