Items & Products Carousels Markup
You can use structured data to make your rich cards eligible for a list-like display called a carousel. Carousels typically appear only on mobile devices, and only for certain content types, as described below. If you use carousel markup for a content type not currently supported in carousel format, it is not an error; the information can still be displayed, but it not in a carousel.
In some cases, Google Search may display your rich result inside a carousel even if the page does not include structured data for a list: for example, a recipe might appear in a recipes carousel of results from many different websites.