It's unfortunate that your AppleCare coverage expired without you realizing it. Apple Care or Apple Care+ is an optional extended warranty and support plan that users can choose to purchase for their devices. It's designed to offer additional coverage for issues that might arise beyond the standard warranty period.
It's worth noting that AppleCare coverage doesn't automatically renew. If you purchased AppleCare at the time of buying your iPhone, its coverage duration is typically 1 to 3 years from the original purchase date. After that period, the coverage ends unless you choose to extend it by purchasing additional coverage.
In the end, whether to purchase AppleCare+ is a personal choice. It offers peace of mind and additional benefits, but it's not mandatory. If you didn't purchase it, you'd rely on the standard warranty for any repairs or replacements within the initial warranty period. It's unfortunate that you have some damage on the back of your iPhone 13 Pro Max, but now might be a good time to explore other options for repair if AppleCare is no longer available to cover it.
You won't receive notifications that your plan is about to expire, unless local law provides otherwise.
How to check when your cover expires --> Extend your AppleCare+ cover - Apple Support (IN)
- On your iPhone or iPad, go to Settings > General > About > Coverage, then tap your device.
- On your Mac, click the Apple menu in the corner of your screen. Choose System Settings > General > About. If you can’t find System Settings, choose About this Mac, then choose Support.
- Or go to mysupport.apple.com/en-gb and sign in with your Apple ID. Then choose your device from the list.
- You can also find the expiry date in the Proof of Coverage or Plan Confirmation message that was sent to you when you purchased the AppleCare+ plan.