There is no world in which this would happen, because the auto industry holds up so much secondary and tertiary domestic manufacturing (most of which use China at the bottom anyway).
Those factories won’t be run by Chinese automakers they’ll be shut down with the corresponding loss of jobs and secondary industries.
Gotta say I was annoyed at the time but deprecating the Australian car manufacturers last decade means we have no scruples about allowing cheap as chips Chinese EVs through the door and I’m loving it.