Accordion

It's possible to add an accordion to meta.

PHP

$box = register_cuztom_meta_box( $id, $post_type, array(
    
    'fields' => array(

        array(
            'id'     => '_data_accordion',
            'type'   => 'accordion',
            'panels' => array(
                array(
                    'id'     => '_data_accordion_panel_1',
                    'title'  => 'Panel Title',
                    'fields' => array(
                        // Fields here
                    )
                ),
                array(
                    'id'     => '_data_accordion_panel_2',
                    'title'  => 'Panel Title',
                    'fields' => array(
                        // Fields here
                    )
                ),
            )
        ),

        ...

    )

) );