Analytics reports for custom sales channels

[andrewrobbins]

Quick rundown of my situation:

I've created an unlisted public app. The main purpose of the app is to authenticate to the Storefront API.

Once authenticated, I'm then allowing users to create a checkout on a third-party website. This is done by making a call to the Storefront API and getting a "checkout url" back. I then redirect the user to the Shopify checkout page to purchase.

The issue I'm having is that purchases made via this checkout URL are not being attributed to my sales channel in the analytics reports. I try to filter by "Sales Channels" and nothing comes up.

Do I need to do something special to make this work? Perhaps I need to add URL params to the checkout URL to attribute my sales channel to the eventual purchase?