Secretary-General Antonio Guterres, announcing the appeal at the UN headquarters in New York, said the funds would bring "life-saving relief" for nearly five million Syrians and would cover a period of three months.
Whirring along a rail between two long shelves packed with coffee capsules, a robot stopped, pivoted to the right, shone a light before grabbing an item and dropping it into a paper bag.
Washington was able to quickly forge an international coalition to back Ukraine after Russia invaded in February 2022, providing tens of billions of dollars in military aid, training Kyiv's troops and imposing punishing sanctions on Moscow.
The cut in Pakistan's rating has sparked concern for the country's financial image and has resulted in intense criticism of the incumbent government for failing to steer the country out of the economic crisis.