@Jawed ,
Quickbooks Online connector does NOT allow you to bring in your reports, but rather you have the option of logging in and pulling the different tables of data. You then would have to recreate the reports within Power BI. The other option would be to export you Quickbooks Online Report into a CSV or Excel file, and then connect to the report that way, but that would involve you updating the file in order to have the most recent data.
Thanks
Jarrett