Front - Add Custom Icons to Icon Control

functions.php

if( ! function_exists( 'front_child_icon_control_custom_icons' ) ) {
    function front_child_icon_control_custom_icons() {
        $icons_url = get_stylesheet_directory_uri() . '/assets/icons/';
        $custom_script = '
        var addFilter = wp.hooks.addFilter;
        addFilter("frontgb.component.icon.control.fgb.icons", "front-child/icon-control-custom-icons", frontChildIconControlCustomIcons);

        function frontChildIconControlCustomIcons(iconsObj) {
            iconsObj[ \'fgbCustomIcon1\' ] = {
                prefix: \'fgb\',
                iconName: \'custom-icon-1\',
                iconPath: \'' . $icons_url . 'custom-icon-1.svg\'
            }
            iconsObj[ \'fgbCustomIcon2\' ] = {
                prefix: \'fgb\',
                iconName: \'custom-icon-2\',
                iconPath: \'' . $icons_url . 'custom-icon-2.svg\'
            }
            return iconsObj;
        }
        ';
        wp_add_inline_script( 'wp-blocks', $custom_script );
    }
}
add_action( 'enqueue_block_editor_assets',  'front_child_icon_control_custom_icons', 99 );