entity_embed.routing.yml

entity_embed.dialog:
  path: '/entity-embed/dialog/entity-embed/{filter_format}/{entity_embed_button}'
  defaults:
    _form: '\Drupal\entity_embed\Form\EntityEmbedDialog'
    _title: 'Embed entity'
  requirements:
    _entity_access: 'filter_format.use'
    _custom_access: '\Drupal\entity_embed\Form\EntityEmbedDialog::buttonIsEnabled'

entity_embed.preview:
  path: '/entity-embed/preview/{filter_format}'
  defaults:
    _controller: '\Drupal\entity_embed\EntityEmbedController::preview'
    _title: 'Preview embedded entity'
  requirements:
    _entity_access: 'filter_format.use'

entity_embed_button.list:
  path: '/admin/config/content/embed-button'
  defaults:
    _entity_list: 'entity_embed_button'
    _title: 'Embed Buttons'
  requirements:
    _permission: 'administer embed buttons'

entity_embed_button.add:
  path: '/admin/config/content/embed-button/add'
  defaults:
    _entity_form: 'entity_embed_button.add'
    _title: 'Add Embed Button'
  requirements:
    _permission: 'administer embed buttons'

entity.entity_embed_button.edit_form:
  path: '/admin/config/content/embed-button/{entity_embed_button}'
  defaults:
    _entity_form: 'entity_embed_button.edit'
    _title: 'Edit Embed button'
  requirements:
    _permission: 'administer embed buttons'

entity.entity_embed_button.delete_form:
  path: '/admin/config/content/embed-button/{entity_embed_button}/delete'
  defaults:
    _entity_form: 'entity_embed_button.delete'
    _title: 'Delete Embed button'
  requirements:
    _permission: 'administer embed buttons'