How to create the auto layout list section into 2 columns on mobile - Squarespace 7.1

@media only screen and (max-width: 640px) {
  .user-items-list-simple:not([data-num-columns="1"]) {
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 10px !important;
  }

  .list-item-content__title {
    font-size: 1rem !important;
  }

  .list-item {
    padding: 0.5rem !important;
  }
}