Setting a Default Featured Image for Post Submissions

/**

 * Assign default featured image

 *

 * @link https://wpforms.com/developers/how-to-set-a-default-featured-image-for-post-submissions/

 */

function wpf_dev_post_submissions_process( $post_id, $fields, $form_data ) {

    // If form ID is 463, run code below

    if ( 463 !== absint( $form_data[ 'id' ] ) ) {

        return;

    }

    // Assign image as the default featured image

    // Replace 2812 with the image attachment id

    $image_id = absint(2812);

    set_post_thumbnail($post_id,$image_id);

    }

add_action( 'wpforms_post_submissions_process', 'wpf_dev_post_submissions_process', 10, 3 );