BootApp

There are several ways to start an app when booting the tablet. There are several options for Android devices.

First way:

For meeting room displays and high-performance devices, the BootAPP function should be found under Settings/Operating aids.

Second way:

The second way would be via an app from the Playstore such as this one here

There are many apps in the Playstore that can do this. You just have to search for Boot App or Autostart App.