ProductInventory

Indicates whether the merchant has enabled inventory tracking for this product. When false, the product is untracked and is treated as always available — isInStock is true, aggregated is null, and consumers should not render out-of-stock or backorder UI based on stock-level fields. When true, stock-level fields on aggregated reflect real merchant inventory.

Indicates whether this product’s inventory is being tracked on variant level. If true, you may wish to check the variants node to understand the true inventory of each individual variant, rather than relying on this product-level aggregate to understand how many items may be added to cart.