View all of an app’s workspaces
You can view all open windows for an app, including those in Split View and Slide Over.
From an open app: Tap the app icon in the Dock.
Swipe up from the bottom edge of the screen if you don’t see the Dock.
From the Home screen: Touch and hold an app icon, then choose the Show All Windows quick action.
For an app in the Dock, swipe up from the bottom edge of the screen if you don’t see the Dock.
Note: If you touch and hold an app icon for too long before choosing a quick action, the icons begin to jiggle. Tap Done or press the Home button (models with a Home button), then try again.