It will not harm your car, all EVSE L2 are compatible and negotiate/signal with the car charging circuits. The main difference is maximum charge rate, and the i3 charger should be able to supply 6 or 7 KW charging for the I Pace. The I Pace maximum L2 charge rate is 7 KW.
Are you in Europe where the charge cable attaches to the EVSE?
The wall unit is just a safety relay. The electricity to power the vehicle on board charger is just passing through from your house to the car.
All the wall units are built to the same J1772 specification.