Does Apple replace screens that are cracked beneath the glass on an iPhone 14 Pro Max?

The cost to replace screen on the iPhone 14 Pro Max is $379(US) or $29(US) if you have AppleCare+. To determine if that is what you need, then schedule an appointment at the Apple Store.

iPhone Repair & Service - Apple Support

They will replace the whole phone with a refurbished one for a price.

Genius Bar Reservation and Apple Support Options - Apple

There are several layers in a screen that may crack, it may just be a screen replacement for a lower price than whole phone replacement.