Does it create products or variants?
No. SKU Stock Sync does not create products or variants.
The app only works with products, variants, SKUs, inventory items, and locations that already exist in Shopify.
If you add new products or variants in Shopify, SKU Stock Sync may need to detect and prepare them before they can be included in syncing.
SKU Stock Sync is designed to sync inventory quantities between matching variants. It is not a product creation, SKU generation, or catalog management app.