Apple has released iOS 13.3.1 with numerous bug fixes including a new setting that allows you to disable the constant location checks being performed by the iPhone 11 U1 chip. Apple has stated that this is caused by the new U1 ultra-wideband chip that needs to be turned off in certain locations due to international regulatory requirements. The location checks are only done on the device and that no data is sent to Apple, but with how large tech companies abuse their user’s data, people are rightfully concerned.
Source: https://www.bleepingcomputer.com/news/apple/apple-ios-1331-released-with-fix-for-location-tracking/