If the cars onboard charger could take 9kw and the "type 2" connectors were redesigned and uprated to handle 9kw, I don't think there is any technical reason why you couldn't do this in theory.
In practice, type 2 connectors are spec'ed to 32amps max.
11kw chargers are basically three 3.3kw (16amp) chargers, using a three phase supply.
22kw chargers are essentially three 7kw (32amp) chargers using a three phase supply.
As bb1922 has said, both MG models only support single phase and max out at 7kW so it's all academic.