To add an upsell product or modify everything displayed in the cart upsell area:
Go to Settings.
Open the Upsell section.
You can:
add a product by clicking Change or add products,
edit the upsell title (e.g. “Enhance your beard”),
edit the button text (e.g. “Let’s Change!”),
change the applied discount (fixed amount or percentage),
change the image if you want a custom one.
Everything updates in real time in the cart preview.
If something doesn’t display as expected, contact MoonBundles support.