According to a number of user reports on our forums and Samsung Korea Community forums, the initial One UI 5.0 beta build has gone live in the form of software version S90xBXXU2ZVH4 (Germany) / S90xNKSU2ZVH4 (South Korea).
In case you have an eligible device and want to give One UI 5.0 beta a shot, you should be able to register for the beta program by heading over to the Samsung Members app and tapping on the One UI beta banner!
Samsung has yet to say anything about registration slots for the beta being limited, but you might want to hurry and register as soon as possible to make sure you don’t miss out
Source: XDA Forums, Samsung Korea Community Forums (1, 2)
XDA » Mobile » Samsung opens up One UI 5 public beta based on Android 13 for the Galaxy S22 series