iPhone 11 Pro and have noticed that closer to the top of the phone has a slight rattle when shaken or tapped

Recently bought an iPhone 11 Pro in May of this year and have noticed that closer to the top of the phone has a slight rattle when shaken or tapped, is this normal, I have heard that it's something to do with the camera and is normal. Also is it normal for the charger when plugged in to have a bit of leniency? Thanks.

[Re-Titled by Moderator]