No update necessary for the new pad...it is plug and play...the only info I found was that it was suggested that you do a restart. Rivian tried to tell me that they had to program my key cards (and charge me for it) for the new pad, which is also not true...key cards work fine. I am on 2026.15.30.
2026 R1T here…ordered the Qi2 assembly directly through the Rivian Service Portal, received and DIY installed on 6/15, been using regularly without issue since. Just a personal anecdote. Hope your issue gets resolved.