commerce-8.x-2.8/modules/product/commerce_product.links.menu.yml

commerce_product.configuration:
  title: 'Products'
  route_name: 'commerce_product.configuration'
  parent: 'commerce.configuration'
  weight: -15

entity.commerce_product.collection:
  title: 'Products'
  route_name: 'entity.commerce_product.collection'
  parent: 'commerce.admin_commerce'
  description: 'Manage your products.'

entity.commerce_product_attribute.collection:
  title: 'Product attributes'
  route_name: 'entity.commerce_product_attribute.collection'
  parent: 'commerce.admin_commerce'
  description: 'Manage your product attributes.'

entity.commerce_product_type.collection:
  title: 'Product types'
  route_name: 'entity.commerce_product_type.collection'
  parent: 'commerce_product.configuration'
  description: 'Manage fields, form and display settings for your products.'

entity.commerce_product_variation_type.collection:
  title: 'Product variation types'
  route_name: 'entity.commerce_product_variation_type.collection'
  parent: 'commerce_product.configuration'
  description: 'Manage fields, form and display settings for your product variations.'