This is the ship that was seen hunting the Mandalorian at the beginning of the Episode "The Gunslinger".
The Bounty Hunter Fighter was a class of starfighters used by the Bounty Hunters' Guild after the fall of the Galactic Empire. The bounty hunter Riot Mar used one of the starfighters while pursuing the Mandalorian Din Djarin. Unfortunately for Mar, Djarin, flying the gunship Razor Crest, maneuvered behind the bounty hunter and destroyed his fighter. The Bounty Hunter Fighter had a flat appearance with a central cockpit, which could fit one pilot and two wings, where an engine was located between them.