Does it sync products with the same SKU?
SKU Stock Sync syncs variants by SKU and location, not products by name, collection, tag, or option.
SKU Stock Sync syncs variants that share the same SKU at the same Shopify location.
It does not sync products just because the products have similar names, collections, tags, or options. What matters is the variant's SKU and Shopify location.
If two variants use the same SKU at the same location, SKU Stock Sync may treat them as part of the same SKU/location group.
If the same SKU exists at a different Shopify location, that location is treated separately.
Does it sync between locations?
SKU Stock Sync does not sync stock between locations; the same SKU at different locations is treated as separate groups.
Does SKU Stock Sync sync all inventory automatically?
SKU Stock Sync does not constantly sync every inventory item; it monitors changes and processes groups when they become due.
SKU Stock Sync Docs