VanillaBow.java

   public BowItem(Item.Properties builder) {
      super(builder);
      this.addPropertyOverride(new ResourceLocation("pull"), (p_210310_0_, p_210310_1_, p_210310_2_) -> {
         if (p_210310_2_ == null) {
            return 0.0F;
         } else {
            return !(p_210310_2_.getActiveItemStack().getItem() instanceof BowItem) ? 0.0F : (float)(p_210310_0_.getUseDuration() - p_210310_2_.getItemInUseCount()) / 20.0F;
         }
      });
      this.addPropertyOverride(new ResourceLocation("pulling"), (p_210309_0_, p_210309_1_, p_210309_2_) -> {
         return p_210309_2_ != null && p_210309_2_.isHandActive() && p_210309_2_.getActiveItemStack() == p_210309_0_ ? 1.0F : 0.0F;
      });
   }