Hi Tracy - you can do both a Queue Topic report (which has a Parent Topic Group field you can group by). There is also a Topic Group report itself as well.
The biggest think is that both need some text mode to display the project name. (which is the same for both object types)
displayname=Project
querysort=queueDef:project:name
textmode=true
valuefield=queueDef:project:name
valueformat=HTML
I don't think this will apply to FCB, but just remember that if there are only queue topics, the Topic Group is the project name so the report sometimes looks a little weird. LOL!
Hope that helps 🙂