I want to know if the Met rooftop is open in May 2022?

No. Until the summer

Now closed is the Michael C. Rockefeller Wing, the Roof Garden, the Petrie Courtyard Cafe and about a third of the 1250-1800 European Painting Rooms. It is open 6 days a week, on Wednesdays. Closed on Thanksgiving Day, December 25, the first day of January, and the first Monday in May.

Solo hasta verano esta abierto.