No, DUAL CUBE LX Editor for iOS does not support USB connections.
To use DUAL CUBE LX Editor with your iOS device, you must use the Bluetooth Audio MIDI Dual Adaptor (BT-DUAL, sold separately) to connect via Bluetooth.
Refer to “Connecting the DUAL CUBE LX Editor iOS App to the DUAL CUBE LX Unit” for details on how to connect the DUAL CUBE LX Editor with the DUAL CUBE LX.