What is the default order of the navigation?

[hanzckernel]

I am confused in which order the navigation sidebar is arranged? It seems not following alphabetic order nor the alphabetic order in which the files are named.

and here is a my mkdocs.yml file:

theme:
  name: material
  features:
    - toc.integrate
    - navigation.indexes
    - navigation.top
    - navigation.path
    - navigation.tabs
    - navigation.tabs.sticky
    - navigation.sections
    - search.suggest
    - search.highlight
    - content.tabs.link
    - content.code.annotation
    - content.code.copy
  language: en

  palette:
    - scheme: default
      toggle:
        icon: material/brightness-7
        name: Switch to dark mode
      primary: teal
      accent: cyan

    - scheme: slate
      toggle:
        icon: material/brightness-4
        name: Switch to light mode
      primary: blue
      accent: amber

markdown_extensions:
  - tables
  - pymdownx.highlight:
      anchor_linenums: true
      pygments_lang_class: true
  - pymdownx.inlinehilite
  - pymdownx.snippets
  - admonition
  - pymdownx.arithmatex:
      generic: true
  - footnotes
  - pymdownx.details
  - pymdownx.keys
  - pymdownx.superfences:
      custom_fences:
        - name: mermaid
          class: mermaid
  - pymdownx.tabbed:
      alternate_style: true

  - pymdownx.mark
  - attr_list

[kamilkrzyskow]

https://www.mkdocs.org/user-guide/writing-your-docs/#configure-pages-and-navigation

An automatically created navigation configuration will always be sorted alphanumerically by file name (except that index files will always be listed first within a sub-section).

Automatic creation only applies when there is no nav defined in the file. You didn't post it in your example, so it should work as described above.

However, you're using a bunch of features I'm unfamiliar with, so maybe turn some of them off to see if it makes a difference.