Reply To: Header image not scaling on mobile

Dear mormonjesus,
Please use the following css code to adjust scale image in small devices.
Appearance > Customize > Additional CSS

@media (max-width:767px){
    .image-slider-wrapper .slick-list, .image-slider-wrapper .slick-track{
        height:35vh !important;
    }
}

Note: You can adjust the height value as per your requirement.

Best Regards!