Hello Toufiq,
Thanks for looking into this.
Here's a video of my ultimate goal https://www.youtube.com/watch?v=PvoebNVv07o of enabling this with SP Page Builder / Helix.
I know Custom Fields are a new feature with little exposure or proper documentation, however once learned about, they are an incredible feature that allows for extreme customization page content that can be used for multiple industries, and the filtering ability is incredible, helping a web user find exactly what they are looking for in a few clicks.
The problem is SP Page Builder pages is you can't apply custom fields, they have to be articles.
I'm playing with the Articles Integration, but there are some current limitations with that, specifically the ability for full-width and the header row. I'm looking into if I can modify it to look like a regular SPB page.
Ultimately, if SPB could make using Custom Fields easy, it would be a very signifcant value proposition to web developers to considering buying SPB Pro.