upgrade of the tablet
After my first steps in using a tablet on the wall as an interface to Home Assistant using an old tablet with a cracked screen. I got hands on a slightly newer but most of al undamaged tablet a Samsung Galaxy Note although support was ended long ago by Samsung for this tablet LineageOS still has support for at least Android 11. This meant I can use Fully Kiosk Browser for a more native feel and less risk of accidentally closing the browser.
No Google
LineageOS comes without Google you can install Google apps but I chose not to do so. Al I needed was Fully Kiosk Browser which is easy to install as an APK. The fewer apps on the tablet, the less chance to get compromised, in my opinion.