Hi there,
just to clarify; all of you having wlan0 up and running, are you using an USB adapter or the RVdock built in wifi chip
I'min the same situation as noticed here:
I'm using 23_09_sid_edge_6.6.0, and gotsame problem with current 6.1
-------------EDIT----------------
Got it working finally.
For any unknow reason, the arbiam setup script at first boot didn't finished totaly.
I have burned a new SD card with 23_09_sid_edge_6.6.0
and everything (at least Wifi) is fine.
Thank you @balbes150 great job