Just a heads-up as many users in that thread are reporting Android Auto issues with their Pixel 8 and 8 Pro phones, and the response by the Android Auto team there is to file a bug report.
Do you also encounter issues with Android Auto with the Pixel 8/8 Pro?
I had a P7P as well, and I also had no issues due to the phone (but the USB cable that came with the unit was shit).