Is Displaying Restaurant Menu Prices A UX/Accessibility Matter?

I am working with a high-class hotel that owns a number of restaurant venues. I have been trying to do some research, but am coming up short with results to back the idea that exposed restaurant menu pricing is part of good UX/accessibility.

Now I understand the age-old adage "If you have to ask you can't afford it." I could maybe even get behind not displaying pricing on physical menus.

However, I feel webpages being an informational resource users should be able to see pricing to enable decision making.

Overall, I believe in order for the client's site and menu to be considered accessible they would need to display pricing on their menu.

Do you believe this to be the case as well based on your experience and research? (please link in the case of the latter.)

Or, do you believe this is purely in the realm of business policy and that hidden pricing doesn't effect UX? (AKA UX Should have no say in weither pricing is exposed or not.)