How to deep populate

I’m trying to populate a field called articles in a component within a dynamic zone on the “home” page of my page collection.
this is a relational field with many articles.
Why this structure doesn’t work? /pages?filters[slug]=home&populate[contentSections][on][section.article-pick][populate][articles][populate]=true
All i get from this component is the title field.

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Checkout this blog post to learn more. Also can you provide the example not in LHS format but in object notation. It is easier to troubleshoot.

And also the structure of your pagescollection type