Display Parent Page in the WordPress Pages List

/**
 * Add a Parent Page column to the Pages list.
 */
add_filter( 'manage_pages_columns', 'alkesh_add_parent_page_column' );

function alkesh_add_parent_page_column( $columns ) {
	$columns['parent_page'] = __( 'Parent Page', 'alkesh' );

	return $columns;
}

/**
 * Display the parent page title.
 */
add_action(
	'manage_pages_custom_column',
	'alkesh_display_parent_page_column',
	10,
	2
);

function alkesh_display_parent_page_column( $column_name, $post_id ) {
	if ( 'parent_page' !== $column_name ) {
		return;
	}

	$parent_id = wp_get_post_parent_id( $post_id );

	if ( ! $parent_id ) {
		echo esc_html__( '— No Parent —', 'alkesh' );
		return;
	}

	$parent_title = get_the_title( $parent_id );
	$edit_link    = get_edit_post_link( $parent_id );

	if ( ! $parent_title ) {
		echo esc_html__( 'Parent Unavailable', 'alkesh' );
		return;
	}

	if ( $edit_link ) {
		printf(
			'<a href="%1$s">%2$s</a>',
			esc_url( $edit_link ),
			esc_html( $parent_title )
		);
		return;
	}

	echo esc_html( $parent_title );
}