OP was likely referring to this[1] which did in fact have lines like "tesla isn'...

OP was likely referring to this[1] which did in fact have lines like "tesla isn't encrypting their firmware and it's really easy to glean information from the vpn with a packet cap because nothing inside the vpn (was) encrypted".

So yeah, it's possible they did.

1. (best version I can find sorry) https://www.reddit.com/r/EnoughMuskSpam/comments/99sbwa/form...