The open world of Tchia hosts tons of treasure for players to find throughout their adventure, including a special chest that can be found using a map given by the NPC Gaby near the start of the game. A resident of Weliwele, Gaby greets players within one of the first main quests, requesting some crabs in exchange for a treasure map. Leaving this area after collecting the crabs on the following day sees Gaby give the map and a key to open the chest for their potential treasure.

https://screenrant.com/tchia-gabys-treasure-location-find/