I have a 2025 Renault 4 etech and I frequently enable bluetooth thethering so I can access Spotify, HBO etc via the in car entertainment system (It runs a flavour of Android called OpenR Link) , not via android auto. Though I frequently need to enable the bluetooth tethering setting on the phone before the profile can be activated via the cars paired devices menu (where you can select other profiles such as Audio, calling, etc)

While the car has a sim card already, I can't use it for general purpose apps without a subscription. Only updates, remote control and I suppose telemetry.

I usually opt for choosing a bluetooth tether instead of wifi since I already establish a connection for calls, or music / audio books.

It isn't hard to imagine Android being able to transmit vehicle telemetry via the same means.

Volvos also have this. At least my 2021 xc60 did.