I created a few custom fields for my products and one of them (Custom 3) does not display at all under the table view of the products, it’s just a blank space.
For instance, in the screenshot below, I populated the Custom Field 3 (which is, in my case, labeled “Code”) with the text “test”. It shows as intended in the details panel, but not in the table (I made sure to allow the Custom 3 column to be displayed):
I got confused by the options line above, which made it the 3rd line, hence why I would think it’d be the 3rd label. I switched my columns to show “Custom 2” and now it works!