No, there is currently no equivalent Cmd/Ctrl+click to reset the fader in UC Surface on the iPad. To be clear though, even on a desktop computer where you do have Cmd/Ctrl+click to reset the fader capability, it resets the fader to -inf, i.e. all the way down. It does not reset it to Unity. Unity is the 0dB mark on the fader, i.e. no boost no cut. There is no reset fader to unity feature in UC Surface, on any platform.
There already is a double-tap to reset Pan to center feature on the iPad though. If you double tap any channel's pan control, it resets to center.