I have a 2020 Camry XSE, and I noticed that when using Apple CarPlay everything seemed to work except for the phone. For some reason, the audio would not come through to the head unit. Music, maps, voice controls for Siri, everything else was fine. Anytime I tried to place or receive a call the audio stayed on the phone. I went in to the CarPlay settings and selected “Forget Car”, and went back through the setup. All volumes had been reset to zero, so each had to be adjusted independently. Volume for the ringtone had to be set while an incoming call was in progress, car audio for the call had to be adjusted while the call was in progress. Siri volume also had to be adjusted while she was speaking. Once all
of that had been corrected, everything is now working properly as it did before the updates. Hopefully this will help someone else, perhaps with a similar issue to what I was experiencing.