What I remember from that show is that they plug in the Rivian to charge, and 12 hours later the charge level has increased by some miniscule amount. At some point they have to bring in a gas-powered support truck with a gas-powered generator to charge various electric vehicles. If anything, it was a commercial against EVs at the time.

It seems that EVs didn't make much sense in the environment of that trip (going through all of South America, where fast chargers were rare at the time)