How you can toggle off Exposure Notifications in iOS 13.5.
If you’re concerned about privacy, Apple says there is no personally identifiable information that will be shared with the public health authorities including location data. Since the exposure notification feature is enabled by default, you can always opt-out of it once you have upgraded to iOS 13.5, but you can disable Exposure Notifications in Settings.
First launch the Settings app.
Scroll down and select Privacy