Minecraft wiki entry for Skyblock, associated text: Zombified Piglin farms in the Nether Wastes biome provide gold nuggets.
You can make Hoglin farms in the Crimson Forest biome, which gives the player an alternative way to get raw porkchops.
You can make mildly efficient Enderman farms in the Warped Forest biome, which provide ender pearls.
Magma Cube in the Basalt Deltas biome provide magma cream.
You can make Ghast farms in the Soul Sand Valley biome, which provides ghast tears and and an alternative way to get gunpowder.