Through the Advanced details in the module builder and Basic details in the program builder, admins can enable the Reviewable toggle. This allows users to provide a 1-5 star rating and comments upon completion of the assigned learning.
Subsequently, the reviews are accessible to platform admin through Admin > Learning > Modules/Programs.
Accessing the review details, admins are able to view, export or delete the incoming reviews:
To learn more about the standard reporting capabilities in platform, we suggest this article and this tutorial video.