bookingpress_customize_add_dynamic_data_fields

    add_filter('bookingpress_customize_add_dynamic_data_fields', 'bookingpress_modify_customize_data_fields_func', 10);
    function bookingpress_modify_customize_data_fields_func($bookingpress_customize_vue_data_fields)
    {
        //$bookingpress_customize_vue_data_fields vuejs

        return $bookingpress_customize_vue_data_fields;
    }