adding a page bundle with `hugo new` - hugo

Question

I can add a new page with hugo new posts/new-page. But I want to add a page bundle. None of the following work
hugo new posts/2021/10/new-page creates a single new-page.md
hugo new posts/2021/10/new-page/ does the same as above
hugo new posts/2021/10/new-page/index.md works, kind. It creates index.md in the correct path and populates index.md with the archetypes/default.md except, it set the title to index instead of new page
so, how can I add a page bundle with hugo new

Answer 1

You can achieve that using Archetypes , quoting from the docs:
Since Hugo 0.49 you can use complete directories as archetype templates.
in the archetypes/ folder create a new folder named post-bundle/
inside it create a new file index.md
archetypes/post-bundle/index.md :
---
title: "{{ replace .Name "-" " " | title }}"
date: {{ .Date }}
draft: true
---
Then to create a page bundle:
hugo new --kind post-bundle posts/new-page
Notice: I don't think the approach you're doing to set the date in the url is correct , the above method will give a post with the following Permalink : example.com/posts/new-page you can then do the following to get the desired Permalink:
config.toml :
[permalinks]
posts = '/:year/:month/:title/'

Answer 2

In support of Mossab's answer...
a page bundle has three categories:
Branch,
headless
and leaf.
So if you made a file _index.md - it's a Branch bundle, off-the-bat. So viola that's how you make it with hugo new.
If you want a headless bundle, I believe you first need a leaf bundle, and then add:
headless = true to the front matter.
If you want a lead bundle you create an index.md file at any directory level.
So, I believe my point in this is, the way you do this is:
hugo new _index.md
Or
hugo new index.md
and if you want it headless, you use an archetype with the front matter (as Mossab desribes).
Please let me know if I'm possibly misunderstanding something.