Sorry. I’m just passing the information along. I would suggest contacting the Open Home Foundation. https://www.openhomefoundation.org/

For the money the Samsung A9+ is tough to beat IMHO.

11 inch touch screen in a slim package. Get a cheap jelly case run a couple screws into the wall, slip the tablet in place, route a charging cable.

No matter what you buy or build it will eventually be obsolete and need to be replaced. A decent tablet will last around 8 to 10 years as a wall mounted dashboard. The A9+ can be found for around 170 right now and the next prime sale will likely see it around 150. So that’s around 15 to 20 per year of use and all you need to do is either install the HomeAssistant app or setup Fully Kiosk.