I've set up a Facebook Pixel on my Shopify Store and Purchases are coming in and tracking fine.
I've added a straightforward Purchases pixel to the store as I only have one Collection on there, so I don't need to differentiate between Purchases.
However, tomorrow I need to add a different Collection on there, so need purchases ringfenced on Facebook via the different ad sets.
I've experimented with getting a Custom Conversion for Purchases on specific items OR collections set up and they aren't tracking.
Using the following events and rules:
Use the Facebook Pixel to help see what the actual content_ids is.
Looking at one store, I don't see the viewcontent event firing on collections. Going to product pages, the value is . You probably need to include the opening and closing brackets if you're using equals? I know it's basic logic for an array, but maybe Facebook's logic is otherwise.