Minecraft wiki entry for Development_versions, associated text: Spawn in crimson forests and nether wastes biomes.
Randomly spawn with golden sword or crossbow.
Adults are hostile; babies are neutral.
Piglins do not attack players wearing at least one piece of golden armor.
Adult piglins turn aggressive when a player is mining blocks of gold or opening chests, even if they are wearing gold armor.
The player can barter with them by right-clicking with golden ingots or drop them on the ground, which makes them drop at least one item or block.
Currently give only obsidian and flint and steel. This is a placeholder.
Attack adult hoglins.
Baby piglins do not attack and adult piglins do not attack baby hoglins.
Adults attack wither skeletons and withers.
Are creeped out by soul fire, soul fire torches, soul fire lanterns, and zombie pigmen.
Can spawn with golden armor.
Convert to a zombified piglin when in the Overworld and the End.
Currently have none of the sounds from Java Edition and use the player hurt sound. This is a temporary placeholder.