I tried following your steps, but Compilation fails due to missing resources I attempted another approach by renaming the old icon package under Assets to match the new "glass icon" name, which allowed successful compilation. However, this solution behaves differently across my two apps: For the first iOS 18 displays right Both light and dark mode icons work on iOS 26, but the transparent icon doesn’t seem to take effect. For the second Both iOS 26 and iOS 18 show the old version icons

Did you build it with Xcode 26 beta or Xcode 16.4? The Xcode 26 beta build has no errors but causes dark icons to appear as light icons on a white background, while the Xcode 16.4 build has errors.