Apologies for the delay in response. In case you haven't seen it yet, this is already available in our Quickbooks Online connector. You can look for the CC and BCC email address fields in the "Add optional fields" portion.
Do try it out and let us know if you encounter any issues!
Send us a ticket, we will try our best to assist you with your problem
Add CC and BCC fields on QBO invoice create/update
Add fields to add a CC and BCC email address to QBO invoiced. Default settings in QBO that add email addresses to these fields are overlooked when the invoice is created by Workato.