mobile product view

You can add this code to Design > Custom CSS to show 2 items/row on mobile

/* Product 2 columns mobile */
@media screen and (max-width:767px) {
    .products.collection-content-wrapper .list-grid {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    grid-column-gap: 10px;
}
}