Just found this code from Thompsonweb.design
//Collage Blocks Mobile
@media (max-width:480px){
.sqs-block-image .design-layout-collage.sqs-narrow-width .image-card-wrapper{
width:100%;
margin-top:calc(0%)!important;
position:relative}
.sqs-block-image .design-layout-collage.sqs-narrow-width.image-position-right .intrinsic,.sqs-block-image .design-layout-collage.sqs-narrow-width.image-position-left .intrinsic{
left:5%
}
}