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Good day! Maybe my advice will help you.

Usually, when I use iPad in projects, on the tablet I turn off the auto-lock of the tablet and just start the "Access Guide" mode

This is a great feature that prevents the user from minimizing the application. And in the project itself, so that the screen does not always burn brightly, I make a page - a dark screensaver with a display of the time, day of the week and weather, which starts after 5 minutes of non-use. Also in the project you need to select the activation of the screensaver.