config_pages-8.x-2.8/config_pages.links.menu.yml

entity.config_pages.collection:
  title: 'Config pages'
  route_name: entity.config_pages.collection
  parent: system.admin_structure
  description: 'Manage config pages.'
entity.config_pages.collection_tab:
  title: 'Config pages'
  route_name: entity.config_pages.collection
  base_route: entity.config_pages.collection
  parent: entity.config_pages.collection
entity.config_pages_type.collection:
  title: 'Manage Config pages'
  route_name: entity.config_pages_type.collection
  parent: entity.config_pages.collection
config_pages.type_add:
  title: 'Add Config page'
  route_name: config_pages.type_add
  base_route: entity.config_pages.collection
  parent: entity.config_pages.collection