This may have been brought up earlier, as I only looked back a few pages in this thread. I first noticed the heat issue when my map in Android Auto froze while exploring some local secondary roads. After pulling over and getting nowhere with the UVO interface, I pulled the phone out of the wireless charging bay and it was extremely hot - almost too hot to hold. The phone had locked up and was showing a message that only emergency calls were supported until it cooled down.
In the wireless charge bay it was too hot to hold your hand on the surface of the rubber pad in there. A/C had NOT been running, so I turned it on and the bay cooled off almost immediately.
As I don't want to run A/C all the time, I searched the forum and saw where member
@moinmoin said he fixed it using the temp control on the rear seat climate panel. Mine was set at the midway point between the blue and red markings (not on full red/heat), so I dialed it down to the full blue/cold setting and the hot charging bay heat issue disappeared entirely - it now stays at ambient temperature without A/C running, and doesn't even get remotely warm. This is the other thread:
Hot transmission tunnel
If you haven't already, try rotating that back temp dial to full 'cold' and see if it works for you without the A/C engaged. I will be mentioning this to the dealer, as when winter rolls back around, I'll want the ability to use the rear seat area heat without cooking my phone.
I hadn't noticed excess heat on the side of the tunnel (on my LHD car), but if the plumbing is on the right side of the tunnel that would explain why - I'll have to check that area to see . The only thing I can think would help is additional insulation, but I'll see what the dealer has to say.