I can see that this option would be a great suggestion for a product feature, Scott.
The option to know if a customer opened or viewed an estimate isn't yet available. For now, I recommend submitting your feedback directly to our development team. They actively evaluate user suggestions and frequently incorporate enhancements in future software updates.
Moreover, you can check the status of your request, you can click this link: Customer Feedback for QuickBooks Online
Additionally, you can check out this guide to help manage your quotes for future help: Create and send quotes in QuickBooks Online
If you have further questions about your quote, you can comment below, and we'll respond to you as soon as possible.
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