There is a small "Powered By Rivian" badge on each side by the driver and "passenger" doors, if I remember right. The video walkthrough mentioned in the Ars com

There is a small "Powered By Rivian" badge on each side by the driver and "passenger" doors, if I remember right. The video walkthrough mentioned in the Ars comments calls it out specifically, and I was able to see it when stopped next to one at a stoplight.