Hi friends! Is there a way to track which email someone purchased a Commerce Product from?

What I'm doing right now is:

Customer purchases Product.
Automation gives that customer a tag of "CUSTOMER | Product Name"

I've also set up a Rule that tags anyone as "WARM | Product Name" to anyone who's clicked on the registration link in an email.

But I don't know exactly how to see what email lead someone to purchase. 🤔 Anyone have any ideas how to do this?