Update: Not a bug in iOS 26. A colleague was able to test both my simplified project as well as our app on real hardware running iOS 26 beta 7. All works as expected. This may be a limitation of the iOS 26 simulator as running on macOS 15.x perhaps.

There are already at least two bugs filed as J-Ouyang pointed out in the linked thread: FB19400926 FB19404213 Also, a colleague of mine seems to remember a similar issue a while back where receiving push notifications in the simulator required an updated macOS. Currently, we cannot run the macOS Tahoe beta, so potentially that's now required (since iOS 26 beta 4) in order for the simulator to receive notifications.