If you created an issue report, you should be able to filter down to what you need.
I'm not sure what the standard report is, or if there is a standard set that Workfront uploads for every instance but if you mean "My Unassigned issues", you'll probably want to make a copy of the report and tweak the filters in there and the one that stood out for me that I would've removed is Issue >>Role ID equal to $$USER.roleIDs.