WooCommerce: check if product is out of stock and doesn't allow backorders

functions.php

<?php
/*
// source: https://stackoverflow.com/questions/51327748/woocommerce-check-if-product-is-out-of-stock-and-doesnt-allow-backorders
*/
add_action('woocommerce_single_product_summary','show_stock_single',5);
function show_stock_single() {
  global $product;
  $StockQ=$product->get_stock_quantity();

  if ($StockQ>=1)//Stock is Available
  {
    echo "<p>Available</p>";
  }
  elseif($StockQ<1)//Product is Out of Stock
  {
    echo "<p>Out of Stock</p>";
    if ($product->backorders_allowed())//Product is out of stock AND allow backorders
    {
        echo "<p>Backorder Allowed</p>";
    }
    else//Product is out of stock AND DO NOT allow backorders
    {
        echo "<p>Backorder NOT Allowed</p>";
    }
  }
}