Watchface settings stopped working in the latest Connect app for iOS (4.22) release. You cannot customize watchface by its settings. Settings are not saved and default settings are always used. I tested it with three different watchfaces.
Until 4.22 version there was an issue with date settings only (https://forums.garmin.com/developer/connect-iq/f/discussion/162728/settings-broken-again/888235#888235), now settings are not working at all.