I appreciate you reaching out to us with your interest in when None UI Beta would be available for your Note 9, darly. Let me help you as much as possible with your inquiry. Why are you needing the UI Beta for your device? Are you having problems with your phone? There was a software update on the Note 9 last month and here's a link for more details
As far as any more information on software updates, We would ask to keep checking our website as this would be the same information we would have access to and refer you to for details.
Actually, I am signed up through Samsung as a Beta tester and that's why I was asking. However, after reading further through Samsung, it's the carrier's disgretion when they push them out.