Any issues with the latest iOS 18.3.2 software?

No issues As of now ,but aware few users have posted they got yellow/white death screen after updating.

doesn't know is it true or not ?

But keeping the device to latest update is best as it removes all the bugs in previous OS

The camera on my iPhone 15 just shows a black screen since updating to iOS 18.3.2.

Have try all the resets suggested without success. Going to Apple Store (which is 50 miles away!) this weekend to see if they can help.

Hello!

No issues to report here. It’s recommended you Force Restart your device after every update: Force restart iPhone - Apple Support

Have a great day!