Hello,
Create a new category or tag for your sale items. For example, you can name it “Sale” or “Discounted.”
Assign this category or tag to the products you want to include in the sale.
Once you have assigned the category or tag to the desired products, go to the “Appearance” section and click on “Menus.”
Create a new menu or edit an existing one.
In the menu editor, find the category or tag you created for the sale items in the available options.
Check the box next to the category or tag to add it to the menu.
Save the menu.
Best Regards.