In creator dashboard payment tab, it’s possible to see the latest purchases. It’s possible to click on a mail address to see all the purchases of a single user. However it doesn’t work because clicking the link leads to:

https://itch.io/dashboard/purchases?email=XXX%40gmail.com

instead of

https://itch.io/dashboard/purchases?email_username=XXX%40gmail.com

I reported this months ago but I received no reply