Unique is putting his trash into my trash.
Mr. Nakajima gets upset when his neighbor Unique tries to put trash into his trash can. Bucky steps in to break up the altercation.
While the establishing shot prior to this is definitely of New York, and the Brooklyn Bridge, this was shot in Atlanta. The alleyway is at 215A Mitchell St SW, a location for scenes from Spider-Man: Homecoming, Black Panther, and Ant-Man and the Wasp.
(The Falcon and The Winter Soldier S01E01, 2021)