Piglins usually spawn in nether wastes, crimson forest biomes and bastion remnants, and will usually spawn in groups of 2-4. In Minecraft Java Edition, they will spawn only wherethere is a light level of 11 or less, and in Minecraft Bedrock Edition they will spawn where there is a light ...
Using 1.18.2-pre1, Mojang mappings The logic for zombie reinforcement is in the methodnet.minecraft.entity.monster.Zombie.hurt(DamageSource, float); it contains several checks, includingNaturalSpawner.isSpawnPositionOk(...)which checks for an empty valid spawn block within the world border, andS...