I just broke the screen on my S23 Ultra. What's the cheapest way to get it replaced?

there are no cheap ways buddy. even if you buy cheap screen you will regret it,

Samsung, big no.

Experience would be ruined 

For Samsung Tablets We Can Buy Insurance Within 180 Days Of Purchase At Any Samsung Store , I Hope Its Same For Mobile Also... Nicely Buy Insurance If Ur Purchased Date Is Below 180 Days...