I have a BMW with only CarPlay (no Android Auto). Missus has an Android. So my phone was the GPS, even when she was driving. Because BMW only has Wireless Carp

I have a BMW with only CarPlay (no Android Auto). Missus has an Android. So my phone was the GPS, even when she was driving. Because BMW only has Wireless Carplay the phone heats up like crazy. I don't understand why... my phone needs to be plugged in anyway because of the battery drain of the GPS and constant calculations of the screen. Why not utilize that as a means to send the screen data, allowing the WiFi chip to be almost turned off. And it gets worse if you use the charging pad in the car. Charging pad + Carplay is useless. Now she has an iPhone too and now the driver's phone is the GPS. But still, when driving, I need to put mine plugged in, under the seat to ensure it remains within temperature specs. And because of that I forget it every time, no problem, but when I get back to the car it is always overheated.