List of Composite products in Magento.

What are Composite Products?
Composite Products can be used to create a product grouping(kits) and complex products by grouping existing simple or virtual products.

Composite products made using simple or virtual products combinations.

Magento Commerce contains total seven Native Products. Opensource contains only six product type except Gift Card.

List of Composite products in Magento:

Configurable Product
Bundle Product
Group Product

Normal Products:
Simple Product
Virtual Product
Downloadable Product
Gift Card Product

Composite product can be checked using $protected $_isComposite = true for each product Model type file.

Ex. For Configurable Product, you can check, Magento\ConfigurableProduct\Model\Product\Type\Configurable.php file.