Just look up the individual property website under „Dining“ and then „Learn more“. You’ll get a website for the restaurant which often has links for special set menus, holiday celebration menus, reservations etc. Example?

https://www.marriott.com/hotel-resta...3/home-page.mi

it‘s up to the individual properties to keep these sections updated. If they don‘t, it‘s not Marriott or Marriott.com that‘s broken but the individual hotel/restaurant management!