Thank you for sharing, this is very helpful. Weirdly, I am currently scheduled for another b-pillar applique replacement on 1/7. When I talked to the service center, I asked about the fabric patch, and they told me that the current version of the part installed on my car in November did not have it but the one they will be installing on 1/7 will. I do not have the replacement part number yet. I looked through the leaked theory of operation document, but, unfortunately, the version I have does not include any details on repeater and b-pillar cameras.
This bit is curious too. Last time I discussed the issue with a service advisor on the phone, they said they could not access error messages from previous drives but they were "putting the car on visibility". When I asked for an explanation, they said this meant any fault events will now be recorded and accessible to them remotely. I was suspicious of this as it was my understanding faults were already logged anyway.
So, again, some conflicting information from different sources. Le sigh.