You would normally expect to see Out Of Stock items displayed (but greyed out) on a Find And Filter page, as in the example below:
However, if there are 250+ active items on that Find And Filter page, the platform will hide any Out Of Stock items in order to improve page loading speeds. This is important to maintain good performance across the range of devices that consumers may be using to browse your e-commerce site.
Large results sets are handled by Automatic Landing Pages. You can find out more about these, here: Automatic Landing Pages
