A knowledge base article about How to view and report on time worked in ServiceNow provided by the UC Berkeley IT Service Hub - Knowledge Portal
As an IT specialist (itil role) you are able to report only on your own time card entries.
If you have been granted a Time Card Reporting role (timecard_report), you have access to report on all time cards, but do not have visibility to the individual task_time_worked detail entries.
To create a report on time worked for incidents:
*To build filter conditions based on the fields on the associated tasks or incidents, perform the following steps: