Are you trying to find the Stealth Boy in Fallout 76? How about the various Hallucigen Canisters? Well here are two convenient maps to check out they have them marked on a map with the locations to find them at.
Here are a few other post to check out since you’re in the game; Nukashine Wake-up Locations, Bobblehead Locations and Vendors Locations.
Where are all the Locations for Locked Toolboxes - Map
List of Fallout 76 Treasure Map Locations Guide
How to Combine/Merge Items with the Chessboard in Fallout 76?
Fallout 76 - Some Pre-War Food Location Favorites
Where can I Find a Chainsaw Location in Fallout 76?
Where to Find/Farm Robots in Fallout 76?
Where to find a Nuka-Cola Grape in Fallout 76?
Where to find Common Chems in Fallout 76 - Map