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/How to use the Pleasant Valley Claim Tickets in Fallout 76?
Where is Vault 96 located in Fallout 76?
Fallout 76 Community Calendar - Season 16
Where to find/farm Opossum Locations in Fallout 76?
Where to find/farm Fiberglass in Fallout 76
Where is the Blue Devil Location in Fallout 76?
Wasteland Warfare - Unaligned Mysterious Stranger - Fallout 76
Map & Route of Locations for Spooky Halloween Scorched in Fallout 76