Assigning IAPs to to an existing AppLab release is not possible.
I have an AppLab release currently in Production with some DLCs attached to it (all marked as Free) and they can be downloaded within the App itself. I have just added two more DLCs with min-version-code set the my current Production release. The addins were released in the Platform Services -> Add-ons page and assets were uploaded using the ovr-platform-tools.
When I go to the build page (that is on AppLab Prod) the newly added Addons are listed but I can not edit their price or the Required option. When the price is not set, it is impossible to download the addin programmatically within our App. The "Edit" button is simply grayed out. How can I simply add new DLCs to an existing Production release?
