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

entity.bat_event_series.add_page:
  route_name: entity.bat_event_series.add_page
  title: 'Add Event Series'
  appears_on:
    - entity.bat_event_series.collection

entity.bat_event_series_type.type_add:
  route_name: entity.bat_event_series_type.type_add
  title: 'Add event series type'
  appears_on:
    - entity.bat_event_series_type.collection