Goldenrivett
The FBW characteristic is such that the pilot makes the changes through some computer. So it needs to be confirmed that the respective computer has received the demand. For instance changes on FCU need to be checked on FMA to ensure FMGC has received it. Same with changes to thrust lever because thrust levers are also mode/phase selectors. Movement of flap lever needs to be checked on the slat flap indicator by calling the number to ensure that SFCC has received the demand, movement of landing gear lever by checking the red lights that the LGCIU has got it. Similarly Parking brake selection is checked on the pressure gauge to ensure BSCU has done it. That is why I am not a fan of silently checking things. When you call out you force the other pilot to cross check. Correct operation need not be monitored because ECAM does it for you and if there is a problem it will trigger ECAM alert.