manage_inventory.links.menu.yml

# Define the menu links for this module

entity.content_entity_manage_inventory.collection:
  title: 'Inventory Entity: Inventory Listing'
  route_name: entity.content_entity_manage_inventory.collection
  description: 'List Inventory'
  weight: 10
content_entity_manage_inventory.admin.structure.settings:
  title: 'Inventory Settings'
  description: 'Configure Inventory entity'
  route_name:  manage_inventory.inventory_settings
  parent: system.admin_structure