How to paginate a subdirectory?

I want templates/index.html to paginate through content/blog

.
├── content
│   ├── blog
│   │   ├── 2020-09-29-rust-optimization.md
│   │   └── 2021-01-10-dont-use-brave.md
│   ├── comments.js
│   └── main.js
├── sass
│   └── aspenuwu.scss
├── templates
│   ├── base.html
│   ├── index.html
│   └── page.html

The documentation is not clear about how to do this, though.

You can make blog a transparent = true (Section | Zola) section and set pagination on a root _index.md instead. I think it should work?