Hi, It seems that, the report is created by some other user, not by you. If user creates a dashboard and place that in his private folder not in public folder, then he has option to define access level of that dashboard. In your case, you might have only access to view that dashboard. Please refer the below link for managing dashboard access: https://help.salesforce.com/articleView?id=analytics_share_folder_with_user.htm&type=0
Please like and answer and mark it as best if this helps.
It seems that, the report is created by some other user, not by you.
If user creates a dashboard and place that in his private folder not in public folder, then he has option to define access level of that dashboard.
In your case, you might have only access to view that dashboard.
Please refer the below link for managing dashboard access:
https://help.salesforce.com/articleView?id=analytics_share_folder_with_user.htm&type=0
Please like and answer and mark it as best if this helps.
Thanks,
Aman