How can I change the Device Name for my iPhone 11, which currently is named iPhone 7?

Used iCloud back of my iPhone 7 to setup my new iPhone 11.  The device name of the new phone is listed as "iPhone 7" instead of "iPhone 11" I still have the iPhone 7. I need to add the 11 to iTunes, Amazon Kindle, etc. and think it will be confusing and cause problems to have two devices with same name.