_index.md Pages not working?

Hello there and thanks for the nice theme! I noticed that `_index.md` files specified in are not properly working like in other themes (Ananke, Papermod). Their usage is described in the [Content organization](https://gohugo.io/content-management/organization/#index-pages-_indexmd) page of the Hugo Documentation. Essentially, the front matter and content of an `_index.md` file is included in taxonomy, allowing one to, for example, use a custom title and brief content before different posts are listed in a blog. In my case specifically, the front matter metadata is being used (e.g. `title: "Journal"`) is being properly used to title a section, but the content is not being shown before the listing of subpages in the section.