Notes app

If you start a new note, there should be a large + in the lower right corner of the note area, in a large gray circle. Tap on that to get the additional controls just above the keyboard. You should see the Camera there.

It is available on iPhone 6 iOS 12.4.6

Click on "+" sign then Scan Documents, Camera will open up. There you have it. Enjoy scanning!

See the article https://support.apple.com/en-in/HT210336

I don’t see the camera either. I opened a new note but when go to the + sign it just types a plus sign. No camera or option to scan.

I have seen on other’s phones the icons you mention; however mine has nothing. I have the latest upgrade installed. Are there settings I need to change? This is what I see

Thank you!! That was it. Apparently it only works in the cloud.

You're welcome. Glad you got it sorted out and I was able to help.

I don't know if there is anything in Settings, however with the latest iOS, you should have the correct Notes version. I know there was a change a couple of iOS versions back. Are you using Notes in iCloud? Check that in settings. Here is what my Notes screen looks starting a new Note. The Plus should be on the lower right where the X is, and this is what pops up when you hit that +. I have an iPhone 11 Pro, with iOS 13.4.1.