Armor rendering error

I've been creating another project with the forge 1.15.2 and you can see the arms but the helmet and the body come out the same, although before there was no error in the body, do you know why?.

I have been doing tests and I have realized that it was the texture the reice and almost everything was solved but now the arms are not seen if I do the arms to the body it is seen but they do not move in synchrony with the arms, just not they move, I understand that the arms are not made of the body, in theory the error is made by Mcreator because I no longer know what to do.

I fixed it was the code that generated the template, it was without.

@Override
			@SideOnly(Side.CLIENT)
			public ModelBiped getArmorModel(EntityLivingBase living, ItemStack stack, EntityEquipmentSlot slot, ModelBiped defaultModel) {
				ModelBiped armorModel = new ModelBiped();
				armorModel.bipedBody = new Modeldark_body().body;;
				armorModel.isSneak = living.isSneaking();
				armorModel.isRiding = living.isRiding();
				armorModel.isChild = living.isChild();
				return armorModel;
			}

			@Override
			public String getArmorTexture(ItemStack stack, Entity entity, EntityEquipmentSlot slot, String type) {
				return "brokmod:textures/armordarkborktexture.png";
			}

And I have corrected it as well.

@Override
			@SideOnly(Side.CLIENT)
			public ModelBiped getArmorModel(EntityLivingBase living, ItemStack stack, EntityEquipmentSlot slot, ModelBiped defaultModel) {
				ModelBiped armorModel = new ModelBiped();
				armorModel.bipedBody = new Modeldark_body().body;
				armorModel.bipedLeftArm= new Modeldark_body().leftArm;
				armorModel.bipedRightArm= new Modeldark_body().rightArm;
				armorModel.isSneak = living.isSneaking();
				armorModel.isRiding = living.isRiding();
				armorModel.isChild = living.isChild();
				return armorModel;
			}

			@Override
			public String getArmorTexture(ItemStack stack, Entity entity, EntityEquipmentSlot slot, String type) {
				return "brokmod:textures/armordarkborktexture.png";
			}