Where is the App Store wishlist in iOS 11?
The wish list has been completely removed from iOS 11 and iTunes 12.7.

This article confirms my statement:


  With iOS 11, you get a truckload of new features but you also lose some pretty useful things. Having already killed 32-bit apps on iOS, Apple has now removed wish lists from the App Store. Since Apple removed iOS apps from iTunes as well, there’s now no way to add apps to your wish list or to see which apps were there in your wish list on iOS 10.


You can share apps into Notes as a workaround.