Workaround for this. Create new NetworkExtension target for macOS. In build phases of main iOS app target, in "Embed App Extension" and "Dependencies" add and choose this new NetworkExtension target for platform macOS. And all works.
Alnik
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
Same issue on macOS 10.15.4, on previous version 10.15.3 in-app purchases load as expected. SKProductsRequestDelegate methods not called.