Currently Peppercorn can be found in Monarch’s Bluffs, Cutlass Keys, and Mourningdale.
There’s a catch though: You still have to grind by harvesting Herbs which have a chance to spawn your needed ingredient. Herbs will respawn around 10-15 minutes depending on the size of the herb.
Monarch’s Bluffs Herb Locations (level 1-25)
We suggest snatching up the herbs directly South of the settlement and possibly moving over the the Western island due to the condensed amount of herbs there. Additionally, the South-eastern part of Monarch’s Bluffs has a decent amount of herbs.
Cutlass Keys Herb Locations (Level 26-35)
We suggest making your way down the Western side of Cutlass Keys to harvest herbs as this is more populated than the Eastern side.
Mourningdale Herb Locations (Level 45-50)
Mourningdale has way less Herbs to choose from but if you just need a few herbs for crafting head North from the settlement.
All information gathered was from personal gameplay and from https://www.newworld-map.com with permission.