WordPress Customizer Sortable Control

Kirki::add_field( 'theme_config_id', [
	'type'        => 'sortable',
	'settings'    => 'my_setting',
	'label'       => esc_html__( 'This is the label', 'kirki' ),
	'section'     => 'section_id',
	'default'     => [
		'option3',
		'option1',
		'option4'
	],
	'choices'     => [
		'option1' => esc_html__( 'Option 1', 'kirki' ),
		'option2' => esc_html__( 'Option 2', 'kirki' ),
		'option3' => esc_html__( 'Option 3', 'kirki' ),
		'option4' => esc_html__( 'Option 4', 'kirki' ),
		'option5' => esc_html__( 'Option 5', 'kirki' ),
		'option6' => esc_html__( 'Option 6', 'kirki' ),
	],
	'priority'    => 10,
] );

<?php
// Get the parts.
$template_parts = get_theme_mod( 'my_setting', array( 'option3', 'option1', 'option4' ) );

// Loop parts.
foreach ( $template_parts as $template_part ) {
	get_template_part( 'partial-templates/' . $template_part );
}