Is it possible to add or remove a "Sale" on the images?

I want to add or remove the "Sale" label for products that are on sale or have discount promos displaying on the upsell section. Is this possible?

Absolutely! You can show or hide the Sale tagging or badge on an upsell item at any given time. This setting is just a simple slide of a button. Check How to show sale badge on images to learn the easy steps.