RichSnippet (ImageObject and VideoObject)

Hello, I am having the problem that the child post does not have featured image then in schema “ImageObject” will not appear.

Before that I added the code below to display the images shared on social networks

function add_parent_post_image( $manager ) {
	if ( is_singular( 'life' ) ) {
	global $post;
	$manager->add_image_by_id( get_post_thumbnail_id( $post->post_parent ) );
	}
}
add_filter( 'rank_math/opengraph/facebook/add_images', 'add_parent_post_image' );
add_filter( 'rank_math/opengraph/twitter/add_images', 'add_parent_post_image' );

Next problem I add the code below to show the video schema but the “‘inLanguage’ => ‘en-PH’,” section automatically switches to “‘inLanguage’ => ‘en-US'”.
How can I fix it.

add_filter( 'rank_math/json_ld', function( $json_ld, $json ) {
    
  if ( is_singular() && ! isset( $json_ld['richSnippet'] ) ) {
    $post_id = $json->post_id;
      $json_ld['richSnippet'] = [
        '@context'         => 'https://schema.org',
        '@type'            => 'VideoObject',
        'name'             => $json->parts['title'],
        'description'      => $json->parts['desc'],
        'uploadDate'       => get_post_meta( $post_id, '_meta_key', true ),
        'duration'         => get_post_meta( $post_id, '_meta_key', true ),
        'contentUrl'       => get_post_meta( $post_id, '_meta_key', true ),
        'embedUrl'         => get_post_meta( $post_id, '_meta_key', true ),
        'interactionCount' => get_post_meta( $post_id, '_meta_key', true ),
        'thumbnailUrl'     => get_post_meta( $post_id, '_meta_key', true ),
	'inLanguage'  => 'en-PH',
	'subtitleLanguage' => 'en-US',
      ];
  }

  return $json_ld;
}, 11, 2);