EVs are different. I depends very, very much on the manufacturer.

Teslas are nothing more than playtoys. Everything is possible, nothing is secure.

Other american manufacturers are also thin. Not quite secure.

European manufacturers have strong traditions with their technology, and they are somewhat similar in this regard. But they are partially leaving these traditions, and there some vulnerabilities start.

Chinese ones, I don’t really know. But they are new, so it is safe to assume that they still have a lot to learn.