Hello,

Navigate to Products > Attributes > edit Attributes and enable the option Change product image on attribute click.

Enable the Additional variations images option in Theme Settings > Shop > Variable products: https://take.ms/aRzS2 and upload and appropriate images to the variations: https://take.ms/MiDHc Then the images will change by clicking on the swatches. Now you have not added the images in all the variations.

Best Regards