Sale do not display on Show only products on sale

Hello @mrlukas, yes please what shortcode did you use to display the products?

I am using /?sale_products=on in the url to filter products that are on sale.

Hi @mrlukas, you should add this shortcode [sale_products] to display the products on sale.
Please refer to this page on available shortcodes: https://docs.woocommerce.com/document/woocommerce-shortcodes/

Hello @mrlukas, since there is no more activity here we consider that my last answer solves your problem therefore.