How can I enable second image hover on mobile product cards?

Hi,

May you try to code below for Dawn theme:

  1. Go to Store Online-> theme → edit code
  2. Assets/base.css
  3. Add code below to end of file
body .card-wrapper .media.media--hover-effect:hover>img+img,
body .card-wrapper:focus .media.media--hover-effect>img+img,
body .card-wrapper:hover .media.media--hover-effect>img+img {
    opacity: 1;
    transition: transform var(--duration-long) ease;
    transform: scale(1.03);
}
body .card-wrapper .media.media--hover-effect:hover>img:first-child:not(:only-child), 
body .card-wrapper:hover .media.media--hover-effect>img:first-child:not(:only-child) {
    opacity: 0;
}
@media(max-width: 749px){
  .card--standard > .card__content .card__information {
    position: relative;
  }
  .card--standard .card__inner .card__media + .card__content {
    display: none;
  }
}