At one point it worked where you can swipe from left and access navigation drawer from any screen. After one of the updates this stopped working and now the only way to access the drawer is to hit the hamburger menu icon from the Dashboard screen. Also the only way to close it is to hit the back button. This should work just like every other app does by swiping to open/close the drawer from any screen.
This is Thomas with Technical support for IRIS. I will forward this information to our developers. If you would like to set up a call to discuss this further please reply and let me know the number we can reach out to.