How can I add the In App Purchase capability to an independent WatchOS Project?

Hello,


I'd like to add the in-app purchase capability to a independent WatchOS 6.2 project (Xcode 11.4, MacOS 10.15.4), but it does not appear in the capabilities library.

Deployment target is 6.2.

What are the prerequisites for an independent WatchOS app for using in-app purchases?


Stefan