Remove clickthrough for one product in shop?

Add the following to Store Settings > Advanced > Page Header Code Injection for the store page. Please see per-page code injection.

<style>

  .products.collection-content-wrapper .tag-coming-soon .grid-item-link {
  
    pointer-events : none;
    
    }
    
  </style>

This is for v7.1 and specific to the poster's need.

This takes advantage of the coming soon tag you put on the product.

Let us know how it goes.