How to accept CloudKit shares with the new SwiftUI app lifecycle?

In the iOS 13 world, I had code like this:

Code Block 
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
		func windowScene(_ windowScene: UIWindowScene, userDidAcceptCloudKitShareWith cloudKitShareMetadata: CKShare.Metadata) {
				// do stuff with the metadata, eventually call CKAcceptSharesOperation
		}
}

I am migrating my app to the new SwiftUI app lifecycle, and can’t figure out where to put this method. It used to live in AppDelegate pre-iOS13, and I tried going back to that, but the AppDelegate version never gets called.

There doesn’t seem to be a SceneDelegateAdaptor akin to UIApplicationDelegateAdaptor available, which would provide a bridge to the old code.

So, I’m lost. How do I accept CloudKit shares with SwiftUI app lifecycle? 🙈