Looks like Apple broke #CloudKit sync in OS 26.4. Remote notifications don’t seem to arrive, so no updates unless the app is relaunched. https://developer.apple.com/forums/thread/820550
iCloud Sync not working with iPhon… | Apple Developer Forums

@lukaskubanek that’s quite the regression!
@amyworrall Yeah, I honestly don’t understand how this could ship unnoticed. Crazy!