Observe property changes of all objects in SwiftData

Question

In Core Data you can do something like this to observe property changes of all objects of a type:

.onReceive(NotificationCenter.default
    .publisher(for: .NSManagedObjectContextObjectsDidChange)
) { notif in
    guard let userInfo = notif.userInfo else { return }
    let updatedItems: [Item] = (userInfo[NSUpdatedObjectsKey] as?
                                Set<NSManagedObject> ?? [])
        .compactMap{$0 as? Item}
    let becameActive = updatedItems.filter{ (item: Item) -> Bool in
        guard let activeBefore = item
            .changedValuesForCurrentEvent()[#keyPath(Item.active)]
            as? Bool else { return false }
        return !activeBefore && item.active
    }
}

How to achieve that in SwiftData? The event still fires but compactMap{$0 as? Item} always returns nil. I guess that's because in SwiftData Item is a PersistentModel, not a NSManagedObject subclass. Extra points for a cleaner solution.