Welcome and thank you for joining the thread, @pdziuk.

Yes, when sending a reminder to your customer, it'll show/reflect on the invoice history. Allow me to help guide you where and share additional information about sending reminders in QuickBooks Online (QBO).

When sending a reminder to your customer, it'll show under the Activities section as well. It'll reflect as You Sent this invoice with the time when you sent it. The only difference is there's a Reminder in the invoice email subject.

For additional information about invoice reminders, you can check this article: Reminders.

You can always get back to me directly by adding a post/comment below if you have any other questions about reminders. I'll be glad to help you!