Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Rattling lenses of the camera unit is off is quite normal. As mentioned above: This is a completely new camera.
I would say it’s abnormal. I tried a few phones at the store. None had it. It’s loud enough to be heard from 1 meter away in a silent room. I could even feel the vibration (not haptic)
 
On my iPhone 17 Pro Max (256 GB, deep blue) I have a clicking sound (following by a very faint crackling-like sound) when tapping the display to turn the screen on (probably related to Face ID). I also have a clicking sound when launching the camera app and when switching between lenses.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.