DynamicViewContent and drop validation (macOS)

If I see it correctly, it is currently not possible to validate a drop operation on a DynamicViewContent when using dropDestination?

Just a simple example: Let's say I build a folder view on macOS where I can arrange folders freely. In this case I need to use DynamicViewContent.dropDestination to get an insertion index on drop. However, it seems that methods like dropConfiguration do not have any effect. Als dropDestionation(…, isTargeted:) seems not to be available.

Here is my sample code:

struct FolderRow: View {
    let folder: Folder

    var body: some View {
        DisclosureGroup(isExpanded: .constant(true)) {
            ForEach(folder.children) { child in
                FolderRow(folder: child)
            }
			.dropDestination(for: Folder.self) { item, idx in
                  print("Dropped at \(idx)")
			}
        } label: {
            Label(folder.name, systemImage: "folder")
                .draggable(folder)
                .dropDestination(for: Folder.self) { items, _ in
                    print("Dropped on Item")
                }
        }
		.dropConfiguration { session in
			DropConfiguration(operation: .move)
		}
    }
}

struct ContentView: View {
    @State private var folder: Folder = Folder.sampleData
    @State private var selection: Set<UUID> = []

    var body: some View {
        NavigationSplitView {
            List(selection: $selection) {
                FolderRow(folder: folder)
            }
        } detail: {
            EmptyView()
        }
    }
}

The dropConfiguration is applied on the Label (in this case the "Move" cursor is used instead of the "Copy" cursor).

Is there any way to do that or is it just an omission in Swift UI?