add_filter( 'aioseo_llms_post_title', 'aioseo_filter_llms_post_title', 10, 2 );

function aioseo_filter_llms_post_title( $title, $post = null ) {

	if ( is_a( $post, 'WP_Post' ) && 14 === $post->ID ) {

		$title = 'Featured: ' . $title;

	}

	return $title;

}