[5.x]: How to create a Product in Craft Commerce 5 (Controller)

[alex-brukhty]

Please help, Craft Commerce 5 have new Inventory logic and I can figure out how to programmatically create new Products with one variant and 1 item in stock. Looks like after new Variant element is getting saved InventoryItem is not being created.
and $variant->getInventoryItem() gives null.

$product = new Product([
    'title' => 'title',
    'typeId' => 2
]);

Craft::$app->elements->saveElement($product);

$variant = new Variant([
    'inventoryTracked' => true,
    'isDefault' => true,
    'primaryOwnerId' => $product->id,
]);

$variant->setBasePrice($prod->price);

Craft::$app->elements->saveElement($variant);

$inventoryItem = $variant->getInventoryItem();
$inventoryLocation = Plugin::getInstance()->getInventoryLocations()->getInventoryLocationById(1);
$updateInventoryLevels = UpdateInventoryLevelCollection::make();
$updateInventoryLevels->push(
    new UpdateInventoryLevel([
        'type' => 'available',
        'updateAction' => InventoryUpdateQuantityType::SET,
        'inventoryItem' => $inventoryItem,
        'inventoryLocation' => $inventoryLocation,
        'quantity' => 1,
        'note' => 'New',
    ])
);

Plugin::getInstance()->getInventory()->executeUpdateInventoryLevels($updateInventoryLevels);

$product->setVariants([$variant]);

Craft::$app->elements->saveElement($product);