Can’t help thinking there’s some over complicating going on. Can’t answer for the Airbus, but Mr Boeing’s FCTM states ‘Retract the landing gear after a positive rate of climb is indicated on the altimeter.’ No more, no less.
Yes there are secondary and peripheral clues - the click of the lever lock, the houses getting smaller etc but Mr Boeing is the master of the art of keeping things simple.
safetypee - the wording in the FCTM is identical for the EFTO case.
rgds