QB Issue Resolution:

The problem is that it sends a small copy of the bill.  If the receiver does not click to open it or go to it’s details, it will not show as read.  And if you send a bcc’d copy to yourself and click to open it, it will show as read.

Resolution for Issue 'Issues when I submit an invoice some companies it does not show viewed under activity. Need to send them a separate email to check on status which is embarrassing.' available: Yes (Solved).
Source: Intuit Community forum.

Issues when I submit an invoice some companies it does not show viewed under activity. Need to send them a separate email to check on status which is embarrassing.: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for copy to yourself
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Error Recovery for copy to yourself [Canada]
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