MAGENTO 2 Create custom product types

http://www.classyllama.com/blog/custom-product-types-magento-2

 

https://www.mageplaza.com/how-create-new-product-type-magento-2.html

https://www.smartiehastheanswer.co.uk/magento2/how-to-create-a-custom-product-type-in-magento2.html

https://github.com/Genmato/DemoProduct