Apple has released iOS 13.7 beta and iPadOS 13.7 beta to developers for testing. The build number is 17H33.
iOS 13.7 lets you opt-in to the COVID-19 Exposure Notifications system without the need to download an app. System availability depends on support from your local public health authority. For more information see covid19.apple.com/contacttracing. This release also includes other bug fixes for your iPhone.
Some features may not be available for all regions or on all Apple devices. For more details:
https://support.apple.com/kb/HT201222
iPhone and iPad owners can install this new beta by signing up for public beta tester by going to Apple Beta Software Program.