Hi husaink17,
Thank you for visiting the Apple Support Communities.
If I understand correctly, you are looking into repair options for your iPhone 11 purchased in Dubai. I’d be glad to guide you through the process.
To start, a cracked back of your iPhone is not covered under the Apple One (1) Year Limited Warranty. You can
Check Your Service and Support Coverage - Apple Support to see if you have AppleCare + available on your iPhone.
To have your iPhone repaired/replaced, you can Find Locations - Location Selector here.
Also, here’s how to Get your iPhone, iPad, or iPod touch ready for service - Apple Support
I hope this helps.
Best Regards!