Unless the FCOM has been changed, as Jonty says, you don't retract the flaps/slats, you leave them out by selecting config 1 as you taxi in, and leave them out during the turnaround on the ramp until setting take-off config after the next push and start.
Bit of a pain, and can't understand why Airbus have not fixed it by now.
Last edited by Uplinker; 30th Aug 2022 at 09:23.