This is actually a pretty common headache on tablets, because the operating system wants to keep those gestures for itself.
What you can do about it
On Windows tablets: put the device in Kiosk Mode (Assigned Access). That way the tablet only runs your app, and you can disable edge swipes with Group Policy or registry settings.
On Android tablets: turn on Screen Pinning or use a kiosk/MDM solution. That locks the user inside the app and blocks system gestures.
On iPads: enable Guided Access in the Accessibility settings. That will keep the user inside the app and turn off the multitasking gestures.
If it’s your own custom app: you can sometimes grab those swipe events before the OS does, but it depends on the platform (Windows, Android, iOS each do it differently).