There’s a chance some cars will come with upgraded side cameras and USS - this has been reported in the USA by a M3 owner on Twitter (much larger side repeater lense vs previous), so it just depends when Shanghai started using the newer cameras vs stopping USS installs. It was reported that in the US the switch to 2023 model cars was around 4th October and USS delete around 7th October.
If Shanghai is similar, it would explain the batch of RHD vehicles parked up in WuWa’s 13th October video might have mixed specs having been built just days earlier.
I get the feeling that the new side cameras have been used in production for a good month or more in the states, as a USA user posted a pic of his Aug 30th car with a larger side repeater lense.