Hi @Esha Goyal welcome to the Atlassian community and wish you are staying safe and healthy.
If you query is to see a report with list if assignees from the Jira exported excel then these are the approaches.
Login to Jira>> Select the project from projects drop down>>Go to Issues on the left explorer>> On the top right side click "Go to advanced search">> click on export (choose export CSV all fields). The exported report will have the below listed columns where you can view and customize as per your project need.
Screen shots below in the same order:
1. Issues view
2. Go to advanced search:
3. Click Export:
4. CSV all fields:
5. Exported report with columns heading.
If you want to make a standard view, then you need to install 3rd party plugin. Steps below:
In Jira go to Apps>> Find new apps>> and search for "Team Worklog Reports". Once you add to Jira, then you may get these filters to pull a report.
Screen shot inline for your reference:
If my post addresses your query, kindly up vote and "accept answer" for the benefit of new members.
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