Mercedes Benz is already for example using KWin from KDE as Wayland compositor and likely many other open source components. So this sort of move is not without precedent.
It's a smart move to do so instead of switching to Android Auto and loosing control of one of the most important component of the experience of the car.
Wow: I run KDE with Wayland on my PC, and given the instability I've experienced, I'm surprised it's suitable for a high-reliability environment like a car. I suppose that it being a more controlled environment may help, but even still, I wonder how stable it actually is.
Kia is also using a Linux Wayland system on an x86-64 Intel machine (with an iGPU) with an (excellent) QT5 UI for their infontainment system