iOS 13.7 Beta Released for Testing
Aside from the ongoing iOS 14 and iPadOS 14 beta tests, Apple has released a separate iOS 13.7 beta and iPadOS 13.7 beta.
The iOS 13.7 beta release seems to primarily focus on the COVID Exposure Notification system, which allows users to opt into COVID contact tracing through an app if one is available from local, state, or federal public health authorities (and for those wondering, these apps are not currently available in the vast majority of the USA).