Unable to uninstall Ckeditor 4 in Drupal 10

I am not aware of that dependency. There isn't one as far as I can see. Where is it?

There is a dev dependency on drupal/ckeditor in composer.json, but that should not affect sites that use webform.

Same issue...I can't uninstall ckeditor because its webform dependency. See config. Is there a place in webform to set the "editor" to ckeditor5?

editor.editor.webform_default

langcode: en
status: true
dependencies:
  config:
    - filter.format.webform_default
  module:
    - ckeditor
    - webform
format: webform_default
editor: ckeditor
settings:
  toolbar:
    rows:
      -
        -
          name: Formatting
          items:
            - Format
            - Bold
            - Italic
            - Superscript
            - Subscript
        -
          name: Media
          items:
            - SpecialChar
            - ImceImage
        -
          name: Linking
          items:
            - DrupalLink
            - DrupalUnlink
        -
          name: Lists
          items:
            - NumberedList
            - BulletedList
        -
          name: Indentation
          items:
            - Outdent
            - Indent
        -
          name: 'Block Formatting'
          items:
            - Blockquote
        -
          name: Tools
          items:
            - Source
            - Maximize
  plugins: {  }

Try running drush webform-repair with the ckeditor5 module enabled.