<?php

require '/var/www/html/app/bootstrap.php';

use Magento\Framework\App\Bootstrap;

class tmp
{

    public function __construct()
    {
        $params = $_SERVER;
        $bootstrap = Bootstrap::create(BP, $params);
        $obj = $bootstrap->getObjectManager();
    }

    public function execute()
    {

    }
}

$script = new tmp();
$script->execute();

<?php

require '/var/www/html/app/bootstrap.php';

use Magento\Catalog\Api\ProductRepositoryInterface;
use Magento\Customer\Model\ResourceModel\CustomerRepository;
use Magento\Framework\App\Bootstrap;
use Magento\Framework\App\State;
use Magento\Framework\DataObject;
use Magento\Framework\ObjectManagerInterface;
use Magento\Quote\Api\CartManagementInterface;
use Magento\Quote\Model\Quote;
use Magento\Quote\Model\ResourceModel\Quote\Payment;
use Magento\QuoteGraphQl\Model\Cart\AssignBillingAddressToCart;
use Magento\QuoteGraphQl\Model\Cart\AssignShippingAddressToCart;
use Magento\QuoteGraphQl\Model\Cart\AssignShippingMethodToCart;
use Magento\QuoteGraphQl\Model\Cart\CreateEmptyCartForCustomer;
use Magento\QuoteGraphQl\Model\Cart\GetCartForUser;
use Magento\QuoteGraphQl\Model\Cart\QuoteAddressFactory;
use Magento\Store\Model\App\Emulation;
use Magento\Quote\Model\QuoteManagement;

class createOrder
{
    private State $state;
    private ObjectManagerInterface $objectManager;
    private CustomerRepository $customerRepository;
    private CreateEmptyCartForCustomer $createEmptyCartforCustomer;
    private GetCartForUser $getCartForUser;
    private Emulation $emulation;
    private ProductRepositoryInterface $productRepository;
    private QuoteManagement $quoteManagement;
    private QuoteAddressFactory $quoteAddressFactory;
    private AssignShippingAddressToCart $assignShippingAddressToCart;
    private AssignBillingAddressToCart $assignBillingAddressToCart;
    private AssignShippingMethodToCart $assignShippingMethodToCart;
    private Payment $resourcePayment;
    private \Magento\Quote\Model\ResourceModel\Quote $quoteResourceModel;
    private CartManagementInterface $cartManagement;

    public function __construct()
    {
        $params = $_SERVER;
        $bootstrap = Bootstrap::create(BP, $params);
        $obj = $bootstrap->getObjectManager();
        $this->state = $obj->get(State::class);
        $this->state->setAreaCode('frontend');

        $obj = $bootstrap->getObjectManager();
        $this->objectManager = $obj;
        $this->customerRepository = $obj->get(CustomerRepository::class);
        $this->createEmptyCartforCustomer = $obj->get(CreateEmptyCartForCustomer::class);
        $this->getCartForUser = $obj->get(GetCartForUser::class);
        $this->emulation = $obj->get(Emulation::class);
        $this->emulation->startEnvironmentEmulation(3);
        $this->productRepository = $obj->get(ProductRepositoryInterface::class);
        $this->quoteManagement = $obj->get(QuoteManagement::class);
        $this->quoteAddressFactory = $obj->get(QuoteAddressFactory::class);
        $this->assignBillingAddressToCart = $obj->get(AssignBillingAddressToCart::class);
        $this->assignShippingAddressToCart = $obj->get(AssignShippingAddressToCart::class);
        $this->assignShippingMethodToCart = $obj->get(AssignShippingMethodToCart::class);
        $this->resourcePayment = $obj->get(Payment::class);
        $this->quoteResourceModel = $obj->get(\Magento\Quote\Model\ResourceModel\Quote::class);
        $this->cartManagement = $obj->get(CartManagementInterface::class);
    }

    public function execute()
    {
        $customer = $this->customerRepository->get('customer@example.com', 3);

        // Create empty cart
        $maskedCartId = $this->createEmptyCartforCustomer->execute($customer->getId());

        // Get cart
        /** @var Quote $cart */
        $cart = $this->getCartForUser->execute($maskedCartId, $customer->getId(), 3);

        // Add bundle to cart
        $bundleRequest = ['bundle_option' => [578 => 1122]];
        $bundle = $this->productRepository->get('bundle_sku');
        $cart->addProduct($bundle, new DataObject($bundleRequest));

        $this->quoteResourceModel->save($cart);
        $quote = $this->cartManagement->getCartForCustomer($customer->getId());

        $addressInputBilling = [
            'country_code' => "FR",
            'street' => ["55 billing street"],
            'telephone' => "0123456789",
            'postcode' => "75000",
            'city' => "Paris",
            'firstname' => "Customer",
            'lastname' => "Test",
            'save_in_address_book' => false
        ];
        $billingAddress = $this->quoteAddressFactory->createBasedOnInputData($addressInputBilling);
        $this->assignBillingAddressToCart->execute($quote, $billingAddress, false);

        // Set shipping address
        $addressInputShipping = [
            'country_code' => "FR",
            'street' => ["55 shipping street"],
            'telephone' => "01223456789",
            'postcode' => "75001",
            'city' => "PAris",
            'firstname' => "Customer",
            'lastname' => "Test",
            'save_in_address_book' => false
        ];
        $shippingAddress = $this->quoteAddressFactory->createBasedOnInputData($addressInputShipping);
        $this->assignShippingAddressToCart->execute($quote, $shippingAddress);
        // Set shipping method
        $this->assignShippingMethodToCart->execute($quote, $shippingAddress, 'my_carrier_code', 'method_code');

        $payment = $quote->getPayment();
        $payment->setMethod('free');
        $this->resourcePayment->save($payment);

        $order = $this->quoteManagement->submit($quote);
    }
}

$script = new createOrder();
$script->execute();

<?php
    private function log($str)
    {
        $str = 'CLASS : ' . str_pad(__CLASS__, 50, ' ')
            . ' - LINE : ' . debug_backtrace()[0]['line']
            . ' - FUNCTION : ' . str_pad(debug_backtrace()[1]['function'], 15, ' ')
            . ' - STR : ' . $str;
        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
        /** @var \Magento\Framework\Filesystem\DirectoryList $directory */
        $directory = $objectManager->get(\Magento\Framework\Filesystem\DirectoryList::class);
        $rootPath = $directory->getPath(\Magento\Framework\App\Filesystem\DirectoryList::VAR_DIR);
        $logger = new \Zend\Log\Logger();
        $writer = new \Zend\Log\Writer\Stream($rootPath . '/log/exception.log');
        $logger->addWriter($writer);
        $logger->debug($str);
    }