commerce_shipping.links.menu.yml

# Shipment menu items definition
entity.commerce_shipment.collection:
  title: 'Shipment list'
  route_name: 'entity.commerce_shipment.collection'
  description: 'List Shipment entities'
  parent: 'commerce.admin_commerce'

shipment.admin.structure.settings:
  title: 'Shipment settings'
  description: 'Configure Shipment entities'
  route_name: 'commerce_shipment.settings'
  parent: 'commerce.configuration'

# Shipment item menu items definition
shipment_item.admin.structure.settings:
  title: 'Shipment item settings'
  description: 'Configure Shipment item entities'
  route_name: 'commerce_shipment_item.settings'
  parent: 'commerce.configuration'