You can create unlimited articles inside a single section and those sections act as the parent doc to those articles. However, you can easily change the parent doc anytime using weDocs.
Changing the Parent Doc off an Article
To change the parent doc, click on the article you want to change its parent doc.

Now, in the left-hand side menu under Page Attributes, you will find the Parent Doc option.

Now, choose the new parent section you want to place that particular doc,

Update the article and you will that this article has a new parent doc in the weDocs dashboard.

This is how you can easily change the parent doc of any article and manage your documentation easily.