WooCommerce Product Addons by Najeeb Ahmad
Plugin: https://wordpress.org/plugins/woocommerce-product-addon/
Compatibility is implemented directly into WooCommerce Product Addons
Also into file functions.php of the current WordPress theme add next code:
add_filter('ppom_option_price', function ($price) { if (class_exists('WOOCS') && !empty($price)) { global $WOOCS; if ($WOOCS->is_multiple_allowed) { $price = $WOOCS->woocs_exchange_value($price); } } return $price; });