Our new feature to remove summary breakdown is now implemented!
To toggle it, go to your Settings > Integration and turn off "Show Invoice Line Items"
Note: For this, you must have line items hidden in QBO invoice templates, or it will still show on the attachment. Go to Custom Form Styles in QBO to change this.
Now, your synced invoices will not show the summary breakdown. If you have any further questions, reach out to the support team!