Fabric 0.14.12
Muffin's Slime Golem 1.0.2
Fabric API 0.72.0
Java 8 Update 351
Architectury 6.4.62

I see there some golems from other mod from your video, could I know the name of those golem mod please? Since it might conflicted to each other.

Stone Golem => BiomeMakeover
Clay Golem => ItTakesAPillage
Iron Golem, Snow Golem => MineCraft
Copper Golem => FriendsAndFoes
Tuff Golem => MobVote2022

Mods List

So I have been checking every golem mods you gave me, Mobvote2022 is the cause of it.
I decomplied the mod and check trySpawnGolem method inside the CarvedPumpkinMixin class.

The method will check Iron Golem, Snow Golem and Tuff Golem structure to spawn certain golem (which is unnecessary to check Iron Golem and Snow Golem structure when using mixin inject) then cancel to whole method, causing other mods that sharing the same method to check and spawn golem never have a opportunity to run.

This also affect Straw Golem mod to not working as well.

Copper Golem from FriendsAndFoes is using Lighting Rod to check copper golem structure instead of Carved Pumpkin so this mod is not conflict

Golem from BiomeMakeover will cancel the method only when golem structure its detect is from the mod itself.

Clay Golem from It Takes a Pillage doesn't using mixin class for checking golem structure and spawn it. so it not conflict.

Okayy, thanks! :)