Expand product description on mobile

Add the below CSS to your Footer Script (Admin panel > Storefront > Footer)

<style>
    .emthemesModez-mobile-collapse-content {
        max-height: none;
    }
    .emthemesModez-mobile-collapse-handle {
        display: none;
    }
    .productView .tab-content {
        overflow-x: auto;
    }
</style>