Hi there, @George Michael.

Thanks for sharing your thoughts here in the Community. At the moment, the option to run a report of all bills by a vendor sorted to clients is unavailable. 

As a workaround, you'll want to pull up reports and export them to Excel. That way, you're able to achieve the details of the report you need. 

For future reference, read through this article to learn more about using filters in customizing reports in QuickBooks Online. 

Feel free to message again should you have additional concerns. I'm always around here to help.