bat-8.x-1.x-dev/bat.links.action.yml

entity.bat_type_group.add_page:
  route_name: entity.bat_type_group.add_page
  title: 'Add Type Group'
  appears_on:
    - entity.bat_type_group.collection
    - entity.bat_type_group.canonical

entity.bat_type_group_bundle.type_add:
  route_name: entity.bat_type_group_bundle.type_add
  title: 'Add type group bundle'
  appears_on:
    - entity.bat_type_group_bundle.collection