As stated no iOS update is need for EV routing, support was added a long time ago. Apple does not need to do anything new here on the phone. It just needs to get on Volvos/P*s radar. The API is well documented in the software that Apple supplies to licensed OEMs.Hmmm. Think of ECG support. When a new country was added it required a watchOS update. I wouldn’t be surprised if adding a new vehicle brand also required an iOS update to enable.
Preconditioning may or may not be in their API, that is more of an unknown to me.