"the power is automatically reduced to idle as the aircraft flares for landing."
Really, on the A320 series I thought it still shouted retard at you at about 30 feet. Otherwise, with the thrust levers in the normal flight position, (the climb detent on the throttle quadrant), when the weight comes on the wheels, the logic changes to ground mode from flight mode, and power is controlled by thrust lever angle, not autothrust. And you would get plenty.
My, limited, understanding is, for a full autoland, the crew still need to,
activate the approach on the fms or overfly the pseuodo approach way point, ensure the correct runway and approach is in the box, ensure ils is tuned and identified, ensure managed nav and speed, arm approach mode, arm autobrake, select flap and gear as required, make sure nothing fails on the way down, retard the thrust levers, reverse thrust, make sure the aicraft is slowing, disconnect autopilot at 70 knots on the roll out, cancel reverse, manual braking, find the correct exit from the runway, reconfigure for the taxi in and grope your way to yhe terminal without hitting anything.
Low vis ops are a real pain.