Hidden Trick to Create a Page That Collects All Your Sale Items
In Upscale, you can create a sale page simply by adding ?sale_products=true after the target link. If you want to create a menu for the page that shows all of your items with sale badge, use the custom link to add menu, input your shop page link, then add the code above after the link.
For example: https//:yourwebsite.com/shop/?sale_products=true.