Interesting, I reviewed every Rivian software update recall letter I could find before I posted this and they all said something like "If you have not already updated to software version 2025.18.30 or later, please do so to remedy this issue at no cost to you," with no mention of the dealership as a remedy - for example, https://static.nhtsa.gov/odi/rcl/2025/RCLRPT-25V585-0759.pdf . This is different from other manufacturers who explicitly mention the dealer, like this Ford EV recall: https://static.nhtsa.gov/odi/rcl/2025/RCAK-25V863-3736.pdf
Aren’t Rivian dealers relatively rare? I’d compare them to Tesla.
Of course they don't mention it. They don't want you to bring it in and have to pay a tech to do the update for you. It doesn't mean the dealership can't do it.