I have owned all sorts of iPads and have never had a screen crack or break.
Screens do not crack or break all by themselves.
Something bad happened to that screen prior to it cracking.
Wkthout any real proof, convincing Apple that this a some sort of manufacturing defect, will be very difficult to prove.
Most Apple Stores do not repair iPads, but ONLY offer in/out-of-warranty device replacement.
If no paid, extended AppleCare+ warranty plan, for this expensive iPad, then device replacement, in lieu of an actual repair will be very costly at 60% of that iPad’s original OEM price from Apple.
If you had the foresight to purchase a paid extended AppleCare+ warranty plan, for that very expensive iPad, then replacement cost will be a much smaller fee of $49 U.S.D..
Your choice is either spend the money to replace the device OR, IF the device is still usable and functional, live with the crack until such time that it does become a functional issue and then decide, then, to replace the device when future funding may become available.
The choices are yours.
Sorry & Best of Luck to You!