Eviation Alice Powerplant Placement
According to a recent article from the travel blog The Points Guy (whose reporters were at the Paris Air Show and toured the aircraft,)


  [W]hile it has three motors, the aircraft can continue to fly with just the rear motor engaged. If one wing-mounted motor fails, the other will be disabled to maintain stability, and additional electric power can be diverted to the rear motor so the plane can continue its flight.