In Xcode 15.4, it's under entity inspector (last tab), look under class, Module would be Global Namespace. Change it to Current Product Module. Note, it still crashes.

Yes, that has been my observation too. make a call to Activity.request (when app is in foreground) Activity.pushToStartTokenUpdates returns the pushToStartToken This defeats the purpose of the new api. The scenario that companies are interested in is mentioned in a blog https://onesignal.com/blog/new-activitykit-notifications-push-the-boundaries-of-current-ios-live-activities/