I just picked up my R1S from service. They said everything was fine, but when I checked the service mode, I'm still seeing red. Any idea what that could be?"
These modules have been showing red for many (everyone?). Same on my R1T, there was a post here a few days ago with the same result and several commenter's, and I noticed Kyle from Out of Spec had the same modules showing red on a recent videos.
No issues with any functionality that I have hear of.
Meaningless unless you're a Rivian engineer and know what those modules are and what the color means. Hidden screens of unknown data are meant to be hidden for a reason. FWIW this has come up a few times before and the answer is always the same. Drive your R1 and enjoy.