What is the difference between stock status and stock quantity and when to use?

Stock quantity keeps track of quantity of the product in stock. Every time a product is purchased it will subtract from the stock. Stock status on the other hand means that product is either in stock or out of stock. WooCommerce doesn’t change stock status by itself so stock status is always set by admin.

Usually stock quantity is used but there are some cases where stock status might be more suitable. For example, if product is made-to-order and there is no defined quantity, stock status would be used.

You will need to use same attribute on all sites. However, please note that Stock Sync cannot sync status, only quantity so for syncing status another solution would be needed.

Stock Sync skips products which SKUs don’t match between the sites so that can be used for excluding products.

Hope this helps! Marking this as resolved but feel free to reopen if you have any questions.