Can I subscribe to an out of stock simple product (child of a configurable)?
Yes, the extension allows customers to subscribe to back-in-stock notifications to specific options of a configurable product. Please ensure to enable the Show Options of Out of Stock Configurable setting in the module general configuration (Stores → Configuration → Amasty Extensions → Out of Stock Notifications → General).
When an out-of-stock option is selected, there will appear a subscription block:
You can check and test this functionality on our
demo as well.