If you are unable to reorder Layers using drag and drop, it may be due to a known issue with Stage Manager on devices running iOS 17 or later.

To resolve this, you can disable Stage Manager in your device settings.

1. Open the Settings app on your device.
2. Go to Multitasking & Gestures.
3. Toggle Stage Manager off.

After disabling Stage Manager, you should be able to reorder your layers in Concepts as expected.