The Software version is N960U1UEU1ZRKP for the unlocked Galaxy Note 9. It has a big size, it is 1681.42 MB. It comes with the November 2018 security patch.
Once signed up for the Beta program, you can check for the update manually by heading into the Settings > Software updates. This will allow the software to update and load the beta version.
The stable Android Pie update for the Galaxy Note 9 is expected to follow in January 2019.
The One UI beta markets include the United States, South Korea, Germany, Poland, Spain, China, France, India, and the United Kingdom.