MacRumors published a story that Apple has released the second beta of visionOS 2.2 to registered developers.

Apple Seeds Second Beta of visionOS 2.2 to Developers With Ultrawide Mac Virtual Display

Apple today seeded the second beta of an upcoming visionOS 2.2 update to developers for testing purposes, with the beta coming a little over a week after the first visionOS 2.2 beta.
visionOS 2.2 can be installed by going to the Software Update section of the Settings app on the Vision Pro and opting into Beta Updates.

The visionOS 2.2 update adds a new feature for the Mac Virtual Display option, allowing it to be set to Wide and Ultrawide. The Ultrawide setting is equivalent to two 4K displays side-by-side, and it is a notable improvement over the current Mac Virtual Display that's available in visionOS 2.1.  Apple Seeds Second Beta of visionOS 2.2 to Developers With Ultrawide Mac Virtual Display