[D9] LayoutComponents

3.0.x is a correct branch name. PAReview is expecting a branch like 8.x-1.x, which was the only type of branch acceptable before drupal.org allowed projects to follow semantic versioning.

I don't see any indentation issues for the reported lines, for example the last one in the following code.

            'attributes' => [
              'lc' => [
                'style' => 'color',
                'depend' => [
                  'opacity' => [
                    'color' => 'lc-inline_column_' . $region . '-title-color',
                  ],
                ],
              ],
            ],
            'class' => 'color',

The last line is indented by 12 spaces, and the next one, containing the closing parenthesis for the array, by 10 spaces. It seems PAReview is getting confused, probably because some array items are array and that item is a string.

Those are definitively false positives.

I will review the project in the next hour.

I didn't find any apparent security issue.

The LcCopyRemove class, which implement a confirmation form, should extend the ConfirmFormBase class.

The namespace of the dependencies is wrong.

dependencies:
  - drupal:ctools
  - drupal:layout_builder
  - drupal:ckeditor
  - drupal:field
  - drupal:field_group
  - drupal:file
  - drupal:filter
  - drupal:options
  - drupal:system
  - drupal:text
  - drupal:user
  - drupal:video_embed_field
  - drupal:views
  - drupal:entity_reference_revisions
  - drupal:media
  - drupal:media_library
  - drupal:linked_field
  - drupal:color_field
  - drupal:media_library_form_element
  - drupal:inline_entity_form
  - drupal:block_form_alter
  - drupal:jquery_ui_slider
  - drupal:jquery_ui_tooltip
  - drupal:sliderwidget

The part before the colon is the project machine name for the project that contains the module. It's drupal only for Drupal core modules. For the Entity Reference Revisions module, for example, it's entity_reference_revisions, but for the Devel Generate module, it's devel, since that module is included in the Devel project.

The user permissions should contain a verb and a direct object, such as in administer users or bypass node access.

Thank you for your contribution! I am going to update your account.

These are some recommended readings to help with excellent maintainership:

• Dries' post on Responsible maintainers
• Best practices for creating and maintaining projects
• Maintaining a drupal.org project with Git
• Commit messages - providing history and credit
• Release naming conventions.
• Helping maintainers in the issue queues

You can find more contributors chatting on the IRC #drupal-contribute channel. So, come hang out and stay involved.
Thank you, also, for your patience with the review process.
Anyone is welcome to participate in the review process. Please consider reviewing other projects that are pending review. I encourage you to learn more about that process and join the group of reviewers.