Has anyone else’s “Find My Friends” app disappeared after the latest iOS update? When I go into the app on safari (the App Store doesn’t even have it), it states this.... “ This app requires specific features not available on this device”

Find My is where Find my iPhone was, not where Find Friends was. It looks like this:

Apple is terrific at changing the user interface, but lousy at telling users that some features are being changed.

For reasons known only in Cupertino, Apple decided to merge "Find Friends" and "Find iPhone" into a unified "Find My" utility. You should find "Find My" exactly where "Find Friends" disappeared from on your Home Screen.

The biggest downside I have uncovered so far is that it is no longer possible to run both features simultaneously, which is how I have previously guided third parties toward recovery of the misplaced device.