arch-8.x-1.x-dev/modules/order/arch_order.links.action.yml

order.add:
  route_name: order.add
  title: 'Add order'
  title_context: arch_order
  appears_on:
    - arch.dashboard
    - entity.order.collection
    - view.orders.page

order_status_add_local_action:
  route_name: order_status.add
  title: 'Add order status'
  title_context: arch_order
  appears_on:
   - entity.order_status.collection

arch_order_mail.new_translation:
  route_name: arch_order_mail.new_translation
  title: 'Add translation'
  title_context: arch_order_mail
  appears_on:
    - arch_order_mail.view