Apple has released iOS 13.6.1 and iPadOS 13.6.1. You can download the updates by opening the Settings, choosing General, then Software Update.
According to Apple’s release notes, the updates: include bug fixes: address an issue where unneeded system data files might not be automatically deleted when available storage is low; fix a thermal management issue that caused some displays to exhibit a green tints; and fixes an issue where Exposure Notifications could be disabled for some users.
