I updated to the Ubuntu 26.04 beta (final version set for release 23rd April). The Framework 12 still didn’t correctly work in tablet mode until I used the 25.10 script outlined in this thread: Ubuntu 25.10 on Framework Laptop 12 - #16 by Fanny_Giraud
This bug was meant to be fixed with iio-sensor-proxy 3.8: Bug #2117530 “Cannot initialize accelerometer on Chrome EC based...” : Bugs : iio-sensor-proxy package : Ubuntu
I have confirmed that my machine is running version 3.8 so should be working without the script as far as I understand it?