Hi Priya,
Can you let us know your version and SP Level?
Kindly check if any of the below Notes will help
2013288 - Firefighter log review Workflows is not getting generated sometime
2060165 - GRC EAM: Some of the firefighter log review workflows are not being generated
1959891 - GRC EAM: Log review workflows are not getting triggered
Also, in your screenshot the WORKFLOW_SENT column without X can be a blank FF session.
If you have set parameter 4020 to NO then the WF will not be triggered for these blank sessions.
Set 4020 to YES(4009 should also be YES) and check if the WF is triggered for blank sessions as well.
As a work around you can use the program GRAC_EAM_LOG_SYNC_TIMEBASED for re-triggering the missing workflows.
Regards,
Manju