Sort Products for WooCommerce

I like to create a manual sort order for my products and I do this by drag and drop. I sort them in a way that they are thematically nicely grouped together.
But then things are sometimes out of stock and that gives a pretty bad impression to the customer when the first 4 our out of stock. So I want that automatically all out-of-stock products go at the end of the list. I don’t want to have to do this manually because that’s way too much work. And I want my nice drag-and-drop order still work. Just those that are out of stock go at the end automatically, the rest stays as it is.