Blizz screen on iPad looks different than in the winter of 2020- why?

Instead of the Blizz screen looking identical to the screen on a Smartboard, the Blizz screen shot is smaller and has the gray Blizz background at the top, bottom and left side. Is this an updated screen for the app or something that needs to be fixed? I am using the iPad for my student who is visually impaired to view close up what the teacher is showing on her interactive white board. The view needs to be full screen on the iPad.