Test magento 2

magento-test.php

<?php

ini_set('display_errors', 1);
ini_set('max_execution_time', 0);
ini_set("memory_limit", "-1");
set_time_limit(0);
error_reporting(E_ALL);
require './app/bootstrap.php';
$bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $_SERVER);
$objectManager = $bootstrap->getObjectManager();
$state = $objectManager->get('Magento\Framework\App\State');
$state->setAreaCode('frontend');

$productRepo = $objectManager->get('\Magento\Catalog\Model\ProductRepository');
$StockState = $objectManager->get('\Magento\InventorySalesAdminUi\Model\GetSalableQuantityDataBySku');


/**
 * @var \Magento\Catalog\Model\Product $product
 */
$product = $productRepo->getById('58227');

// $product = $productRepo->getById('58226');

// echo json_encode($StockState->execute( $product->getSku()), 1);

echo json_encode($product->isSalable());