Not all products showing

Hi,
I do not know why, but I have 12 products on sale, but my carousel shows only 6. I don’t believe that is an existing functionality but of the 6 I really wanted to show other products, not the ones that appear automatically.

Is there a fix for this?
Site: https://armazemconnect.com.br/index.php/product-slider-test/

Using all up to date versions (PHP, Database, WC, WP, your plugin)