Apply texture to custom registered item?

I've been trying to apply a texture to a custom item which I have registered. I don't want to use an existing plugin and only am trying to achieve this with minimum amount of code because I'm writing for a core.

here are the resources I've been looking at:
https://github.com/Big-Potatoes/Cus...Refaltor/Natof/CustomItem/CustomItem.php#L253
https://github.com/alvin0319/Custom...item/properties/CustomItemProperties.php#L170

And here is when I've tried so far:

PHP:

<?php
use pocketmine\item\ItemFactory;
use pocketmine\nbt\tag\CompoundTag;

// ItemManager.php
public function __construct(public Main $plugin) {
   $this->registerItem(new CannonSpawnEgg, "textures/items/egg_cannon");
}

public function registerItem(Item $item, string $texture): void {
   $nbt = CompoundTag::create()
       ->setTag("components", CompoundTag::create()
           ->setTag("minecraft:icon", CompoundTag::create()
               ->setString("texture", $texture)));

   $item->setNamedTag($nbt);
   ItemFactory::getInstance()->register($item, true);
}


I already have a texture pack loaded that has the images I want to use, there are no errors, and when I give myself the item, it has the default 'missing_texture' image.