Its not a case of fitting spying equipment. Here's an example of whats possible, its CCTV granted, but back doors can be built into anything. I agree, dont think that China is spying on everyone, but a back door gives the opportunity if a need is identified. There is a reason why much Chinese equipment is now banned from sensitive/government sites in the west.
https://www.forbes.com/sites/zakdoffman/2019/08/03/update-now-warning-as-eavesdropping-risk-hits-millions-of-chinese-made-cameras/?sh=1a1fdea76bf2
It's a little naive to think that people with access to sensitive information are all well off and driving top of the range cars, Governments are the highest payers, not sure what the average wage at GCHQ is, but would guess many are buying second hand cars!
To be honest I have little knowledge of EVs, but do have some on the question you asked of the other poster.....his comments may seem far fetched to the majority but are quite sensible IMHO.
Of course, if you already have Chinese apps like 'we chat' installed on your phone fill your boots and buy what you want....... :)
Anyway apologies , back on topic, may consider much further down the line if I need a run around and have solar on the house, verdict is out for me for a while.