Is my phone covered for screen repair less than a year old

No. User caused or accidental damage is not covered by warranty. Warranty overs manufacturing defects.Screen breakage is not a manufacturing defect. You will have to pay the screen replacement fee: link-> iPhone Screen Repair & Replacement - Official Apple Support

If you have Apple Care+, the screen repair fee is very low.

What country are you in? I can't find any country where the previous AppleCare (as an extended warranty only) covers iPhones. But if you have AppleCare+ that should be covered with a small deductible, which is $29 in the United States and similarly priced in other countries.

your title say your iphone is a year old

your post body suggest it's 10 years old

these are their repair rules / prices

iPhone Screen Repair & Replacement - Official Apple Support

If you have AppleCare+, it's covered under the 2 incidents of accidental damage you get.

The standard AppleCare warranty does not cover accidental damage.