How can I disable W3 Total Cache Image Lazy Load for Specific Post Type?

You can use this filter,

function ar_lazyload_deactivate() {
    if ( is_singular( 'posttype name' ) ) {
        add_filter( 'do_rocket_lazyload', '__return_false' );
    }
}
add_filter( 'wp', __NAMESPACE__ . '\ar_lazyload_deactivate' );