Edited my post to reflect that. Missed it. But it is happening and Rivian Stories has been quite reliable, so there's that. And Good point on 'night mode' vs 'dark mode', I hope it isn't just limited to the navigation screen but many others as well.AFAIK, "Rivian Stories" is not affiliated with Rivian in any official capacity.
Also, this may be pedantic, but "night mode" may imply that it only works at night (such as via ambient light sensor or when headlights are on). That is NOT the same thing as "dark mode" which has generally been accepted as a user-configurable theme.