Hello,

Please add this code into your custom css box:

@media (max-width: 767px){
.woocommerce.columns-3 ul.products li.product {
    width: 100% !important;
}}

Let us know.

Best regards!

Hello,

Please add this code if you want to remove it:

li#wpmenucartli {
    display: none;
}

Result screenshot.

Or add this in case you want to move it:

li#wpmenucartli {
    padding-left: 75px !important;
}

Result screenshot. Edit the value to your wish.

Best regards!