Multi-App Configuration Issue

Ionic CLI の設定ドキュメントから始め、ionic start my-apps、ionic start app1 --no-deps、および Ionic CLI 5.2.5 での 2 つ目のアプリを使ってマルチアプリ構成を再現します。生成された ionic.config.json ファイルを調査し、ドキュメントに記載された共有ルートの動作が CLI と一致するかを確認します。期待される設定動作が明らかになり、ドキュメントまたは CLI の問題が明確に特定できれば完了です。

Describe the bug
https://ionicframework.com/docs/cli/configuration#config-file

In a multi-app project, apps share a single ionic.config.json file at the root of the repository instead of each app having their own.

Is this correct for the latest version of Ionic?
I created the multi-apps with no-deps parameter and both apps also have their own ionic-config.json. Also .gitignore, tslint.json, package.json.

To Reproduce

1. Create the root project. ionic start my-apps (blank template)
2. Open the ionic.config.json and add the property "projects": {}.
3. Create your apps by ionic start app1 --no-deps. (app1 and app2) (blank template)
4. See that every app has its own ionic.config.json.

Expected behavior
I'm not sure how the multi-app feature of Ionic works.
I though I have a root project with all the project files like package.json and ionic.config.json.
And the "sub-apps" only contains the sources without separated configuration files etc.
Ok they can have a package.json. But why are there all the dependencies, even though the root dependencies should be used? Or do I understand something wrong? Or is the documentation wrong?

Screenshots
If applicable, add screenshots to help explain your problem.

Browser and OS (please complete the following information):

• OS: Windows 10 Pro 64-bit (1903)
• Ionic CLI: 5.2.5

Additional context
I want to create one app base (root) with multi-app feature. Each apps should use the shared root components, services, etc. But an app can also have their own components.
TSLint, TSConfig, Unit-Test-Config, gitignore, etc. should be shared. But currently each subapp have a own config. Exactly the same. DRY.
Maybe this is a bug for the Ionic core repository or CLI? But perhaps it's only a documentation issue. I don't know who this should actual work. This is my first attempt of building a multi-app.
But the fact is, each app in a multi-app project has its own ionic.config.json. The docs says there should only be one shared in the root. Or does this mean, I should delete the config files in my sub-apps?