The new Control Center area also looks nice, but it also highlights what we should have but don’t yet: custom widgets for apps in this area. Please, please, please be saving that for the iPhone 8 reveal, Apple. Don’t make us wait until iOS 12. It looks like the concept is ready to roll…
“These Go To 11”
M.G. Siegler

Control Center is customizable on iOS 11, but only the bottom row of icons.