what happened to zeb in rebels

According to the search results, Zeb survived the war and took former Imperial agent Kallus to the planet Lira San, the lost homeworld of the Lasat, after the end of Star Wars Rebels. The Mandalorian season 3, episode 5 seems to be set after that, introducing a live-action Zeb (still voiced by his Star Wars Rebels voice-actor Steve Blum). It reveals that Zeb returned to the New Republic. Therefore, Zeb survived the events of Rebels and returned to the New Republic.