How can I know how much it costs to repair the screen of my iPhone?

Enter your information here --> iPhone Screen Repair & Replacement - Apple Support

There you'll see that replacing the screen on an iPhone 13 Pro will cost:

$279 OR

$29 if you purchased an AppleCare+ Plan, which is still valid

$29 (U.S.) if you have AppleCare+

$279 (U.S.) otherwise

You can find a list of authorized Apple service shops in your area using this link: Find Locations