https://wccftech.com/download-ios-13-6-ipados-13-6-with-carkey-support-and-more/

Apple has released the final version of iOS 13.6 and iPadOS 13.6 for download. It includes support for CarKey and more. Download IPSW from here.

Before we jump into how you can actually update your device, let's have a quick look at the changelog of the update: