As you may have noticed, there is a possibility to show additional columns at Transactions > Commissions
via the "Edit view" option.
There are many columns and among them, there is also the "Referrer" column.
The Referrer column contains the HTTP_REFERRER
that identifies the page from which the customer proceeded to the thank you (order confirmation) page in which the sale tracking code
In case you wanted to see the page in which the referring affiliate's link/banner was clicked, then you shall enable the First Click Referrer and/or Last Click Referrer columns.