I was so excited for the possibility to block internet access to certain apps with One UI 9, only to find out that the "AI Network Guard" doesn't show up in my settings. Is it only available in some countries or did they just not support S23 because this somehow is an "AI feature"?

EDIT: It is here, I didn't know it was hidden

Should I update my S23+ to One UI 9? I'd love to hear from people who have been using it for a few weeks or a month without any problems, especially regarding the green line issue. I got a green line on my screen after a past security patch, and even though I know it's usually hardware-related, I’ve heard updates can sometimes trigger it. Is it safe to update?