There’s a fairly large thread on the Samsung forums.
https://us.community.samsung.com/t5/Galaxy-Note-9-Questions-and/Note-9-camera-freezes/td-p/387229
Edit: guess I should mention I have not personally experienced any issues with the camera on my Note 9.
Honestly looked the same to me, but my eyes are old. Lol. If anything maybe there was extremely minor hiccups now and then, but I've noticed this on all resolutions (and multiple Samsung hardware in the past).
Mine was dead when I got it as well. However after a short while of charging, it powered on. Sounds like you may either have a dud or possible bad charging cable.
Yeah mine isn't working either. Ordered an at&t model thru Samsung. Got a shipping email on Sunday, but the UPS site says tracking information not yet available. I did pay an extra $14 for one day shipping.