I have similar issue with the mic, I can actually call out Siri by saying “hey Siri” and then as long as the new iOS 14 “orange light” indicator is on (which show u some app is using ur mic) then Siri can’t hear me ( the mic is not working while the Orange light is ON).I have been following this thread for a long time now. I'm having issues with my Carlinkit (USB-C) and Skoda Scala. I just got an email that an OTA update was ready and it was: 2020.12.10.1057 is currently installed on the dongle. As I have fixed one of my issues, I wanted to share this with you.
I had two problems:
1. Connection issues. Sometimes I was lucky and it connected. Most of the time, it did not connect at all. Red light turns on, infotainment can see the dongle, red light turns off again and infotainment says connection failed. This cycle repeated over and over.
2. No mic. During a call, using Siri or using speech for Google Maps, it won't hear me.
After this update, the first issue is solved!They made an option called "Startup delay" which by default is set to 0. I have set it to 5 seconds and it works like a charm. The mic issue remains, which is unfortunate. I'm still in contact with Carlinkit.
Have u try call out Siri? Are u also running iOS 14?