We are using magento 2.1.9ce
And most of our products are made with an api. There was a bug in this api connection, which disconnected simple products from the configurable product.
So now there are configurable products in our backend without any childs. But we have 15K products in total, so to check them manually isn't an option.
Is there a way to see which configurable products don't have a simple product connected?