Do you know of a specific architectural reason why not? The phone can already connect wirelessly to the infotainment system, which acts as an access point and router. Connectivity between the phone and infotainment system need only be switched from USB to Wi-Fi. It's a safe assumption the video is already compressed and the data requirements are tiny (2Mbps or less) compared to what Wi-Fi can do. All the camera data is compressed too; so the display/video processing bandwidth is clearly there. I think it's only a matter of software on both sides.
I want it so when I get in the car with my phone in my pocket, Navigation pops up.
There's this article.
While CarPlay supports wireless, most cars connect via the lightning cable. Learn if & how you can connect wirelessly to CarPlay in your auto
Wireless CarPlay needs Bluetooth and in-vehicle Wi-Fi to work properly. But that’s not all. Your car actually also needs to have a dual-band router built-in to allow for CarPlay.
I haven't been able to find solid reference about Bolt EV's Wi-Fi hotspot feature being dual-band (2.4GHz + 5GHz) - only about 2.4GHz band. I have the Korean version of Bolt so the Wi-Fi & LTE feature is nonexistent and am not personally able to firmly verify that Wi-Fi in Bolt is 2.4GHz-only, but it seems plausible that this is the case for the ones that do have the functionality.
On the issue of a single-band 2.4GHz Wi-Fi, Apple's developer information about doing wireless CarPlay has this to say.
Wireless CarPlay is perfect for any trip. Get in your car without taking your iPhone out of your bag or pocket, and start experiencing...
2.4 GHz Frequency Band
Not recommended for wireless CarPlay
(from page 209 of the presentation)
It seems that 2.4GHz band is only regarded as a fallback, so it would be unwise to build wireless CarPlay support on top of limited hardware. Obviously, Apple doesn't think the data & latency requirements are as lean as you think, and I tend to agree because for real-time screen projection you need low-compression, low-latency output. It's not the same as streaming Netflix of YouTube videos. In my experience with driving external PC monitors via USB, wired USB 2.0 connection barely make the cut at sub-720p resolutions and that provides 480Mbps max throughput. 2.4GHz Wi-Fi essentially tops out at 150Mbps in real life.