My iPhone 14 back screen is cracked does this come under warranty

Apple's standard warranty, known as Apple Limited Warranty, does not cover accidental damage such as a cracked back screen. This type of damage is typically considered user-inflicted and is therefore not included under the warranty.

However, if you have AppleCare+ for your iPhone 14, it includes coverage for up to two incidents of accidental damage every 12 months, subject to a service fee. For a cracked back screen, you would likely need to pay a fee, which is generally lower than the cost of a full repair without AppleCare+.

To get a definitive answer and find out the exact cost, it's best to contact Apple Support or visit an Apple Store or an authorized service provider. They can provide specific details based on your warranty status and any additional coverage you might have.