As far as Im aware a number were replaced under warranty but others have replaced themselves, which in theory better batteries. There has been no general recall, but I could be wrong. My Dec 2021 build car has not had a recall for it yet! Although lots of software updates for other issues like no HVAC, which affected me, but still not right. So MG not alone in that case as well.
I do remember some owners had dash cams fitted, that were permanently live, resulting in a dead 12v. Also when setting up for an overnight charge on cheap rates, the car has died because it is in ready mode with a message on the screen and the charge lights flashing. I have noticed this myself since switching to cheap overnight charging, so leave it is a late as possible before plugging the charger in.