URL scheme for viewing currently stored website data on iOS Safari
If you want to view or delete website data for specific sites in Safari for iOS, use the following URL to get directly to the page you finally arrive on after locating the Website Data button somewhere on the page you opened after locating the Advanced button somewhere on the page you opened after locating the Safari button somewhere on the page you opened after locating the Apps button somewhere on the Settings main page:
prefs:root=SAFARI&path=ADVANCED/REMOVE_WEBSITE_DATA