If I have warranty with Apple may I get a replacement on the screen ?

Very vague.

What is wrong with the screen?

Only Apple can tell you if they will cover.

As with most any warranty on most any product, damage is not covered. Warranties cover manufacturer defects, not damage.

It depends. If you have AppleCare+ then yes!. If you don't, then yes they can fix it but no, it is not covered under the limited warranty.

https://www.apple.com/legal/warranty/products/ios-warranty-document-us.html

This Warranty does not apply: (a) to consumable parts, such as batteries or protective coatings that are designed to diminish over time, unless failure has occurred due to a defect in materials or workmanship; (b) to cosmetic damage, including but not limited to scratches, dents and broken plastic on ports; (c) to damage caused by use with another product; (d) to damage caused by accident, abuse, misuse, liquid contact, fire, earthquake or other external cause;