diff --git a/app/code/Magento/CatalogInventoryGraphQl/Model/Resolver/OnlyXLeftInStockResolver.php b/app/code/Magento/CatalogInventoryGraphQl/Model/Resolver/OnlyXLeftInStockResolver.php
index ab3f374e87660..d67090bf90172 100644
--- a/app/code/Magento/CatalogInventoryGraphQl/Model/Resolver/OnlyXLeftInStockResolver.php
+++ b/app/code/Magento/CatalogInventoryGraphQl/Model/Resolver/OnlyXLeftInStockResolver.php
@@ -51,10 +51,10 @@ public function resolve(Field $field, $context, ResolveInfo $info, ?array $value
 
         $product = $value['model'];
         if ($product->getTypeId() === self::PRODUCT_TYPE_CONFIGURABLE) {
-            $variant = $this->productRepositoryInterface->get($product->getSku());
-            return $this->getOnlyXLeftQty($variant);
+            $product = $product->getTypeInstance()->getUsedProducts($product)[0] ?? null;
         }
-        return $this->getOnlyXLeftQty($product);
+
+        return $product !== null ? $this->getOnlyXLeftQty($product) : null;
     }
 
     /**