Once you've opted in to making SKULabs the master of inventory for your store, we control inventory levels for all products on that store.
Through listing stock rules, you can control how individual listings push inventory to your sales channel. To find all listings associated with an item SKU in SKULabs, open an item's details, then scroll to the listings panel.
You can edit listing stock rules from within each listing's details page. Using a rule skip in place of the store_default default stock rule will prevent SKULabs from pushing inventory.
For advanced users looking to opt each listing in individually, you can set your store stock sync rule to skip then override store_default with free for tighter control over which specific listings SKULabs manages inventory for.
This can also be done in bulk by using a Listing rules CSV import on the Imports/Exports page.