It’s a physical, grouped product.
https://paperjampdx.com/product/brilliant-thoughts-pocket-books/
I have tested it with composite products and they are showing up fine.
I am seeing the correct pixel under WooCommerce > Settings > Integrations > Facebook for WooCommerce > Pixel
I did discover that some of the missing items are because part of them are in production and I have set to hidden. That’s fine. I am missing ones I expect to be seeing though. They are in stock, show up on the website, and should show up in catalogue and search.