Copper Golems are not available in vanilla Minecraft
You cannot spawn a Copper Golem without mods, datapacks, or commands that add it
Install a mod or datapack that includes Copper Golems
Use the mod’s or datapack’s specific spawn method
If using commands, use the entity ID provided by that mod or datapack
In vanilla Creative mode, there is no Copper Golem spawn egg
In vanilla survival mode, there is no crafting recipe or natural spawn for a Copper Golem