Android 16 Beta 1 has started rolling out for Pixel devices

Google has released the first beta for Android 16, arriving more than two months after Android 15’s official release. As expected, the beta is rolling out to Pixel devices enrolled in the Android Beta Program. It introduces new features and improvements that may make it to the final release of Android 16 later this year.

One notable change is the removal of the ability for apps (excluding games) to restrict screen orientation and resizability on larger displays.
↫ David Uzondu at Neowin

Basically, this seems to mean applications will no longer be allowed to limit themselves to phone size when running on devices with larger screens, like tablets. Other tidbits in this first beta include predictive back support for 3-button navigation, support for the Advanced Professional Video codec from Samsung, among other things. It’s still quite early in the release process, so more is sure to come, and some things might not make it to the final release at all.