Here’s a quote from a Cult of Mac article:
“Slide Over panels appear on the left or the right, unlike in iOS 10. Also, you can swipe an app off to the right of the screen to dismiss it, and swiping back in from the right side will bring that app back, just like in iOS 9 and iOS 10.”
Link to full article:
https://www.cultofmac.com/490710/sli...t-view-ios-11/
If the above quote is accurate than the function appears to be broken instead of removed. I can slide an app away but I can’t slide it back out. I’m looking for a setting but no luck so far.