Oberoi confirms it hosted Prince William and Duchess Kate, while the official tour record and contemporaneous departure reports show the Agra stop ended with their flight out of India that evening.
Prince William and Catherine, then Duke and Duchess of Cambridge, used The Oberoi Amarvilas in Agra during the final day of their April 2016 India and Bhutan tour. The hotel hosted them, and contemporaneous reporting places meals and a Luxury Suite at the property.
Correction:
This note corrects or narrows an earlier hotel claim using the cited records.