Suggested by Haroon Khizar – Needs Votes
There should be feature available out of the box from MSFT there should be an option available on the PDP that a customer can register its email and once the product is back in stock an alert is generated infor of email should be routed.
Status Details
Thanks for the feedback. We will continue to monitor the votes to determine its consideration into our feature backlog. - Boyce Zhu, Principal Product Manager for Dynamics 365 Commerce