Hello, @Lucas,
We regret to inform you that there is no option available in our theme for the product columns on the mobile version only. However, you can achieve this by using Custom CSS. Please copy and paste the following CSS code to XStore >> Theme Settings >> Theme Custom CSS >> Global CSS and then clear your browser cache.
@media only screen and (max-width: 480px){
.products-grid .product {
width: 100% !important;
}
}
We hope this helps.
Best Regards,
8Theme’s Team