I’m Kate. Here are some Shopify apps that enable you to offer free shipping to selected countries only for a specific collection:
Essential Free Shipping Upsell: This app allows you to create custom shipping promotions based on various criteria, including country and collection. You can also display a progress bar toward free shipping to motivate customers to add more items to their carts.
Advanced Shipping Manager: This app provides a comprehensive set of shipping management tools, including the ability to create custom shipping rates based on country, collection, and other factors. You can also use the app to create shipping zones and assign different rates to each zone.
Free Shipping Bar: This app displays a customizable bar at the top of your store that announces your free shipping policy. You can target the bar to specific countries and collections, and you can also set a minimum order value for free shipping.
I hope my suggestions will provide you with valuable insights.
Our solution, MAPIT,perfectly fits the requirements you are seeking. This application empowers you to effortlessly personalize shipping zones, conditions, and costs by drawing the area required on a map! You can use it for the hole site or a specific collection. And you have a 7 days trial so you can check it out