It looks like iOS 13.5 is close to launch.
Apple has released the golden master versions of iOS 13.5 and iPadOS 13.5 to developers, which means these are final versions ready for public consumption (via MacRumors). These GM updates will be tested with developers and as long as there are no big issues discovered, we should see iOS 13.5 and iPadOS 13.5 released to the public in the next week or so.
The update to iOS 13.5 brings with it several improvements. It includes support for the exposure notification API that Apple and Google are working on which will allow public health authorities to create coronavirus contact tracing apps. Users will be able to opt in or opt out of the COVID-19 exposure logging.
Also included in this update is a tweak to Face ID that'll make it easier to unlock your iPhone while wearing a mask. Normally Face ID will try to scan your face a couple of times before letting you unlock with a passcode, but Face ID doesn't work when you're wearing a mask. With iOS 13.5, your phone will recognize that you're wearing a mask and more quickly give you the passcode unlock option.
Apple is adding a feature that'll let you have your medical ID information automatically send your Medical ID to the dispatcher when you make an emergency call. You can also have your Medical ID information display on the lock screen of your iPhone.
Other improvements packed into iOS 13.5 include a toggle that'll let you disable the Group FaceTime feature that automatically enlarges the tile of the person talking, meaning all of the participants' windows will remain the same during a video call. Apple Music subscribers are gaining the ability to share songs to Instagram Stories, too.