That's a great question, @steve63.

In QuickBooks 2019, you can now view the activity or history of an invoice, but not like in the online version (which will display at the bottom). When you open the invoice, there's a See History link located at the upper left. Clicking this link will give you the status (Sent, Viewed, Paid, and Deposited).

For additional information, consider checking out this article: Verify that an invoice was emailed and read by the recipient.

This should answer your concern for today. Keep me posted if you need anything else. I'll be happy to help. Have a great rest of the day.