This metric is visible in the Shopify analytics dashboard, so I assume there's a way to retrieve the data programmatically but didn't see it in any of the schemas.
How can I retrieve this data via API?
There are some other fields that ShopifyQL does not have the schema for, have you got a solution for this?
I found a solution to this, if anyone else wants to know. If you inspect a Reports page in Analytics of Shopify Admin, and look for the network request with this link https://analytics.shopify.com/queries?beta=true&dataOnly=true you can get the shopifyql query string under Form Data. You can see all the fields that you filtered in the report