My wife has survived more than half a dozen strokes. She accidentally moves around the icons on her Pixel phone until we can not even bring back the list of al

My wife has survived more than half a dozen strokes. She accidentally moves around the icons on her Pixel phone until we can not even bring back the list of all apps you get by swiping up. I need a way to lock down the icons so it would take a very coordinated person to unlock them, but Google refuses to allow that.