Mobile version ,Sale badge covering the image

Hello,

Share the page URL to check the issue.

​Please try to add the below CSS code from the Appearance > Customize > Custom CSS, and check.

@media only screen and (max-width: 767px){
.woocommerce .has-product-nav span.onsale {
    top: 1rem !important;
}
}

PS- you can change the value as per need.