Do you offer replacements for a Pixel 3 XL screen? How much would a replacement cost?

they do

Visit the uBreakiFix website they are a Google and Samsung authorized store offers from Pixel 2 to Pixel 3 to Pixel 4 please check uBreakiFix website enter store location and then prices will show for all services from Samsung to Apple to Google phones not a Apple authorized service center but is a Google authorized service center and Samsung authorized so you need to start a repair on the website ask you to select a store location and then ask you to select a device and what you want to repair on it then you'll see the prices if you need the website it is this https://www.ubreakifix.com/