I am creating a custom content type (Called a Platform) that holds pertinent data for software platforms. My goal is to allow our users to create pages of knowledge for these platforms. What I would like to have is a Platform CustomContentEntityObject (which I already have and it works fine) that has many subpages of content of knowledge pages. I have looked around and tried doing something like createpage.action?spaceKey=[spaceKey]&fromPageId=[platformCustomContentEntityId] without success. It looks like that functionality is meant only to allow Page entities to be parents and not custom content.
My question is, is this even possible with the normal methods? I can come up with workarounds, but I really was hoping to be able to leverage the existing child-parent functionality within Confluence.