How to create a new custom product type on Magento 2.3

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'HGV_Modulename',
    __DIR__
);

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
  <module name="HGV_Modulename" setup_version="1.0.0"/>
</config>

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Catalog:etc/product_types.xsd">
  <type label="NewCustomProductType" modelInstance="HGV\Modulename\Model\Product\Type\Newcustomproducttype" name="newcustomproducttype"/>
</config>

<?php


namespace HGV\Modulename\Setup;

use Magento\Framework\Setup\InstallDataInterface;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Eav\Setup\EavSetup;
use Magento\Eav\Setup\EavSetupFactory;

class InstallData implements InstallDataInterface
{

    private $eavSetupFactory;

    /**
    * Constructor
    *
    * @param \Magento\Eav\Setup\EavSetupFactory $eavSetupFactory
    */
    public function __construct(EavSetupFactory $eavSetupFactory)
    {
        $this->eavSetupFactory = $eavSetupFactory;
    }

    /**
    * {@inheritdoc}
    */
    public function install(
        ModuleDataSetupInterface $setup,
        ModuleContextInterface $context
    ) {
        $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);

        // associate these attributes with new product type
        $fieldList = [
            'price',
            'special_price',
            'special_from_date',
            'special_to_date',
            'minimal_price',
            'cost',
            'tier_price',
            'weight',
        ];
        
        // make these attributes applicable to new product type
        foreach ($fieldList as $field) {
            $applyTo = explode(
                ',',
                $eavSetup->getAttribute(\Magento\Catalog\Model\Product::ENTITY, $field, 'apply_to')
            );
            if (!in_array(\HGV\Modulename\Model\Product\Type\Newcustomproducttype::TYPE_ID, $applyTo)) {
                $applyTo[] = \HGV\Modulename\Model\Product\Type\Newcustomproducttype::TYPE_ID;
                $eavSetup->updateAttribute(
                    \Magento\Catalog\Model\Product::ENTITY,
                    $field,
                    'apply_to',
                    implode(',', $applyTo)
                );
            }
        }
    }
}

<?php


namespace HGV\Modulename\Model\Product\Type;

class Newcustomproducttype extends \Magento\Catalog\Model\Product\Type\AbstractType
{

    const TYPE_ID = 'newcustomproducttype';

    /**
    * {@inheritdoc}
    */
    public function deleteTypeSpecificData(\Magento\Catalog\Model\Product $product)
    {
        // method intentionally empty
    }
}