EDD - Bundle License to emulate the normal licenses.

example.php

<?php

add_action( 'init', function() {
  if( !isset( $_GET['edd_action'] ) && !isset( $_POST['edd_action'] ) )
    return;

  if( !isset( $_GET[ 'license' ] ) || !isset( $_GET[ 'item_id' ] ) )
    if( !isset( $_POST[ 'license' ] ) || !isset( $_POST[ 'item_id' ] ) )
      return;

  if( !class_exists( 'EDD_Software_Licensing' ) )
    return;

  $license = ( isset( $_GET[ 'license' ] ) ? $_GET[ 'license' ] : $_POST[ 'license' ] );
  $item_id = ( isset( $_GET[ 'item_id' ] ) ? $_GET[ 'item_id' ] : $_POST[ 'item_id' ] );

  $license_information = EDD_Software_Licensing::instance()->get_license( $license, true );

  if( !is_object( $license_information->download ) )
    return;

  if( !$license_information->download->is_bundled_download() )
    return;

  $find_child_license = get_posts( [
    'post_parent'    => $license_information->ID,
    'post_type'      => 'edd_license',
    'posts_per_page' => -1,
    'post_status'    => 'any',
    'meta_key'       => '_edd_sl_download_id',
    'meta_value'     => intval( $item_id )
  ] );

  if( empty( $find_child_license ) )
    return;

  $find_child_license = array_shift( $find_child_license );

  $new_license = get_post_meta( $find_child_license->ID, '_edd_sl_key', true );

  if( $new_license == '' )
    return;

  $request_filter = function( $response, $args, $license_id ) use ( $license_information ) {
    $response['bundled_products'] = $license_information->download->get_bundled_downloads();

    return $response;
  };

  add_filter( 'edd_remote_license_check_response', $request_filter, 20, 3 );
  add_filter( 'edd_remote_license_activation_response', $request_filter, 20, 3 );

  if( isset( $_GET['license'] ) )
    $_GET['license'] = $new_license;

  if( isset( $_POST['license'] ) )
    $_POST['license'] = $new_license;
}, 9 );