adding some information in case it helps someone out.
Found a really good deal on an Amazon Fire Tablet 10.1 (2021)
I used the Fire Toolbox to remove the amazon bloatware and set the lock screen to none. this allows the power button to be used to directly wake it up to the app no password pin or even to swipe to unlock. you will need to connect the tablet to a windows PC and enable developer mode detailed instructions on this in the link above.
I then sideloaded Fully single app Kiosk APK and the Victron GX display app APK using the Fire tool kit
I configured fully to only use the GX app side loaded from the tool box and to use the built in camera to wake up the tablet screen and to put it to sleep after 5 minutes or if its dark.
to attach it to the wall I used this Wall mount
