[Forge 1.19.2] Rendering an Item held by an entity using a Geckolib 3 model

[LittleEzra]

I have an entity that I want to be able to hold weapons. I am using Geckolib 3.1.28 and forge 43.1.52. I followed the tutorial on the Geckolib wiki and managed to get the item rendering, but without the rotation the model should have. I was wondering how to make it render with the proper display settings.

[Endloww]

Hey ! I'm in 1.19.2 and i have an issue, how do you fit an item to your entity ? Did you succeed to make that ?

I tried this

protected void populateDefaultEquipmentSlots(RandomSource p_219154_, DifficultyInstance p_219155_) {
this.setItemSlot(EquipmentSlot.MAINHAND, new ItemStack(Items.STONE_SWORD));
} 

like for the wither skeleton in minecraft holding a stone sword, but my sword is not showing up on my mob