Auto sort. A simple addition that will help you first display products that are in stock, and then those that are not available. This means a list of products in a category on Opencart 3.0. That is sorting products will be by quantity in stock, by default, but not by warehouse status.
Out of stock - to the end of the list of products Opencart 3.0
The module has no settings. You just need to install it and check how the products in the category are displayed, the order should change there.