It is important to prevent customers from adding products to their cart that they are not able to purchase. To disable and modify the display text of the "Add to Cart" button when the viewed product cannot be shipped to the customer's country, you need to add code snippets to your product and collection pages.
You may need a developer to implement this. Here is a link to the code samples.
Here’s how a client of ours has styled their Add to Cart button when a product is not able to be shipped to the customer’s country.
