Thank you for the guidance.
I see now that the filters object is available only on collections and search. I want to make an index of filter values on a page using a Liquid widget in a page template. I’m able to loop all products to get values (and count) for a metafield like Brand but that’s really not performant and has a 1,000 product limit anyhow. Guess I’d need to develop an app to accomplish this outside of Shopify’s environment.
