You have also called your collection products and your data products which is confusing.
As the first is accessed as
site.products
And the other as
site.data.products
And if you do have blog posts they are under
site.posts
Break out your where filter to see what is going on there.
Here I leave out the filter and just get one item and view its data.
{% assign product = site.products | first %}
- Title {{ product.title }}
- Name {{ product.name }}
- Featured: {{ product.featured }}
- {{ product | inspect }}
The last will show you all your fields as keys and values
Also remember to set booleans without quotes in YAML
---
featured: true
---