The dashicons control allows you to select an available icons from the WordPress Dashicons iconfont.

The returned value is a string and does not contain the dashicons dashicons- prefix, and allows you to handle the selected values as you see fit.

Example

Kirki::add_field( 'theme_config_id', [
	'type'     => 'dashicons',
	'settings' => 'dashicons_setting',
	'label'    => esc_html__( 'Dashicons Control', 'kirki' ),
	'section'  => 'section_id',
	'default'  => 'menu',
	'priority' => 10,
] );

Usage

<?php $icon = get_theme_mod( 'dashicons_setting', 'menu' ); ?>
<span class="dashicons dashicons-<?php echo esc_attr( $icon ); ?>"></span>