I had the same story, which is why the last phone I got for my grandma was an iPhone SE (which still has the home button). This way, no matter where she ends up

I had the same story, which is why the last phone I got for my grandma was an iPhone SE (which still has the home button). This way, no matter where she ends up, there's this large and obvious thing that she can press to return back to the familiarity of the home screen.