pm-4.1.x-dev/modules/pm_feature/pm_feature.links.action.yml

pm_feature.type_add:
  title: 'Add Feature type'
  route_name: entity.pm_feature_type.add_form
  appears_on:
    - entity.pm_feature_type.collection

pm_feature.add_page:
  title: 'Add Feature'
  route_name: entity.pm_feature.add_page
  appears_on:
    - entity.pm_feature.collection
    - view.pm_feature.collection
    - entity.pm_epic.canonical
    - entity.pm_project.canonical