Shopify show featured image when product is clicked on, not variant image by default

I need to be able to show the product featured image whenever a customer clicks on a product rather than defaulting to the first available variant image. This website explains it very easily
https://megalashacademy.com/collections/new-arrivals/products/lash-and-brow-cleanser-concentrate-10ml-sachet?variant=43069315580119