There is an option to set slides to show in random order:NANY 2020 Pledge - Android App - DiscussionList
I actually worked on this a bit to make it so that the "random" question order does not change, and remembers where you left off, so that you won't encounter the same question twice.
You can "reset" the random order when you get to the end (or whenever you want).
And note that you are shown a random list of the questions in your current section when you trigger the slideshow mode. So if you want to see all questions you need to trigger slideshow from ALL section.
Note also that by default, if you hit the back button from within the slideshow mode, you exit the app, and it will relaunch into slideshow mode when next started. This is done so that you can essentially keep the app always in slideshow mode. You can change this option from preferences if you generally prefer the listview mode.