You can download and install iOS 16.1 beta 4 and iPadOS 16 beta 11 on your iPhone and iPad.
As Final Release Nears, Apple Seeds iOS 16.1 Beta 4 and iPadOS 16 Beta 11 to Developers and Public Beta Testers
Apart from the above-mentioned updates, Apple has also released macOS Ventura beta 10 and tvOS 16.1 beta 4. If you are a registered developer, you can download these updates over the air, provided you have a previous beta already installed.
In order to download iOS 16.1 or iPadOS 16 beta, go to Settings > General > Software Update while connected to Wi-Fi. The update will show up in a few seconds, and all you have to do is tap on Download and Install. But remember, this is only possible if you enrolled in the Apple Developer Program with a previous beta installed, otherwise these updates won’t show up.
macOS Ventura beta 10 can be downloaded from System Preferences > Software Update, whereas the latest tvOS 16.1 beta 4 is available by going to Settings > System > Software Update on Apple TV.