Until now, any ToolbarItem(placement: .bottomBar) will cause this annoying warning, just tested in iOS 26.3.2 simulator with Xcode 27. This is definitely a bug, not an incorrect view layout issue. Adding 'UIKitToolbar' as a subview of UIHostingController.view is not supported and may result in a broken view hierarchy. Add your view above UIHostingController.view in a common superview or insert it into your SwiftUI content in a UIViewRepresentable instead.

02/14/2025 still no way to delete a iCloud container :D