Add After Entry Widget to All Post Types, including Custom Post Types

functions.php

//* Make sure your child theme has this line in the functions.php file
add_theme_support('genesis-after-entry-widget-area');

add_action( 'genesis_after_entry', 'lunarwp_add_after_entry_widget_area' );
/**
 * Display after-entry widget area on the genesis_after_entry action hook.
 *
 * @since 1.0.0
 * 
 * @uses genesis_widget_area() Output widget area.
 */
function lunarwp_add_after_entry_widget_area()
{
    //* Bail out if the theme does not support after entry widget
    if ( ! current_theme_supports( 'genesis-after-entry-widget-area')) return;
    
    //* Get all the custom post types
    $custom_post_types = get_post_types(array('_builtin' => false), 'names');
    
    //* Bail out if this page is not one of the custom post types
    if ( ! in_array(get_post_type(get_the_ID()), $custom_post_types)) return;

    genesis_widget_area( 'after-entry', array(
        'before' => '<div class="after-entry widget-area">',
        'after'  => '</div>',
    ) );

}