How to display a sold out disabled button for out of stock products

The app will not show the Add to cart button for sold-out products. No additional configuration is required. 

Furthermore, the app allows you to show a Sold out disabled button instead of the Add to cart button for out of stock products. Simply go to the Visual preferences section, and check the option: Display a sold out button when the product is out of stock

In this way, the app will show the Add to cart button for available products and a Sold out disabled button for out of stock products.