Links to inner Notion pages (sub-pages)

[belkaxoy]

Hello!
I am trying to make a blog using Gatsby + Notion, using this plugin.
Here is site and here is source.
I don't understand how can I make links to subpages of notion's page. I mean links to follow from posts-list page to single post page.
I have no any data at allNotionArticle.edges.node.children. Could you tell where can I find data to create links?

Can you tell where can I find data to create links?