Nested group by meta query - WordPress

function eduprime_get_nested_events()
{
    // get the meta
    $event_posts = get_posts(array('post_type' => 'tp_event', 'posts_per_page' => -1));
    if( ! $event_posts ) return '';

    $status_meta = array();
    foreach ($event_posts as $single ) {
    	$meta = get_post_meta( $single->ID, 'tp_event_status', true );
    	if (!in_array($meta, $status_meta)) {
    		$status_meta[] = $meta;
    	} 
    }
    
    // no terms?  bail.
    if( !isset($status_meta) || empty($status_meta) ) return '';
    
    $out = '';
    
    //loop through the terms
    foreach( $status_meta as $meta )
    {
        // get videos in each meta
        $events = get_posts(array(
            'post_type' => 'tp_event',
            'meta_query' => array(
				array(
					'key'     => 'tp_event_status',
					'value'   => $meta,
					'compare' => 'IN',
				),
			),
        ));
        
        // no videos? continue!
        if( ! $events ) continue;
        $out .= '<h2>' . esc_html( $meta ) . '</h2>';
        $out .= '<ul>';
        // loop through the video posts
        foreach( $events as $v )
        {
            $link = sprintf( 
                '<a href="%s">%s</a>', 
                esc_url( get_permalink( $v ) ),
                esc_html( $v->post_title )
            );
            $out .= '<li>' . $link . '</li>';
        }
        $out .= '</ul>';
    }
    return $out;
}