Can I generate a list the shows who I emailed reports to? Not statements or invoices..

Thanks for taking the time to post here in the Community, @bl6585. I'll help you send feedback for you to resolve your concern.
 

The option to generate a list that shows all sent email reports is unavailable. However, you can send feedback to our product developers for this feature in QuickBooks Online to help improve your experience.
 

Here's how:
 

1. Go to the Gear icon.
2. Choose Feedback.
3. Enter your comments or product suggestions.
4. Then, click Next to submit feedback.
    

You can visit our QuickBooks Online Feature Requests website to track the status of your submitted feedback.
 

When you want to send an email report next time, I also suggest adding a carbon copy (CC).
 

You may refer to this article if you want to create a mailing list using the Contact List report. 
 

If you have any additional information or clarification, let me know in the comment section. I'll be happy to give you a solution for that. Keep safe and have a good day!