The top set of dashboard widgets shows devices Lumeta Spectre knows about, but FireMon does not. This means that FireMon is not defending the IPs listed in the Unmanaged by FireMon widget. Consider exporting these from Spectre and importing them to FireMon to complete its coverage.
Spectre cannot "see" the IPs listed on the Unmanaged by Spectre widget. This indicates that your Scouts cannot "see" into the network on which they are located. Check your Scout deployment. Perhaps the device is off-network. This set presents devices FireMon knows about, yet Spectre does not.
These panels will show any devices managed by both Spectre and FireMon. The panel is empty because no devices were co-managed by both Spectre and FireMon.