if it's not in the FCOM/FCTM then it's just his own personal thing.
As I said, that is not an Airbus prescribed call, if anywhere it will be in your Ops Manual.
Personally, (if it’s not written in the ops manual) and he’s hung up on saying QNH (which is preceded by a call to set QNH anyway) your instructor has a firm grasp of the non essentials. Be happy that he’s got nothing else to pick you up on.