Does SKU Stock Sync sync all inventory automatically?

No. SKU Stock Sync does not continuously sync every inventory item in your store.

SKU Stock Sync automatically monitors inventory changes and processes SKU/location groups when they become due for syncing.

A SKU/location group is made from variants that share the same SKU at the same Shopify location.

This means the app focuses on inventory that has changed or needs attention. It does not constantly rewrite every matching SKU in the background.