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I have created new product type in magento2 using https://www.classyllama.com/blog/custom-product-types-magento-2.

After the i can't see any product info in view page.. It only display the Images tab in view page..

product_type.xml

<?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 name="custom_product_type_code" label="Custom Product Type Label" modelInstance="XXXCustomiseProductInfoModelProductType" indexPriority="60" sortOrder="80" isQty="true">
 </type>
</config>

Type.php

class Type extends MagentoCatalogModelProductTypeAbstractType

 const TYPE_ID = 'custom_product_type_code';

 /**
 * @inheritdoc
 */
 public function deleteTypeSpecificData(MagentoCatalogModelProduct $product)
 
 // method intentionally empty
 

Please try below code to create custom product type.

In your etc/product_types.xml add following code

<?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="Customtype" modelInstance="XXXCustomiseProductInfoModelProductTypeCustomtypecode" name="customtypecode">
 <priceModel instance="XXXCustomiseProductInfoModelProductPrice"/>
 </type>
</config>

Create price model Model/Product/Price.php and add following code

<?php
namespace XXXCustomiseProductInfoModelProduct;

class Price extends MagentoCatalogModelProductTypePrice

In your Model/Product/Type/Customtypecode.php add following code

<?php
namespace XXXCustomiseProductInfoModelProductType;

class Customtypecode extends MagentoCatalogModelProductTypeSimple


 const TYPE_ID = 'customtypecode';

 /**
 * @inheritdoc
 */
 public function deleteTypeSpecificData(MagentoCatalogModelProduct $product)
 
 // method intentionally empty
 

Add following code in Setup/InstallData.php

<?php 
namespace XXXCustomiseProductInfoSetup;

use MagentoFrameworkSetupInstallDataInterface;
use MagentoFrameworkSetupModuleContextInterface;
use MagentoFrameworkSetupModuleDataSetupInterface;
use MagentoEavSetupEavSetup;
use MagentoEavSetupEavSetupFactory;

class InstallData implements InstallDataInterface


 private $eavSetupFactory;

 /**
 * Constructor
 *
 * @param MagentoEavSetupEavSetupFactory $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(MagentoCatalogModelProduct::ENTITY, $field, 'apply_to')
 );
 if (!in_array(XXXCustomiseProductInfoModelProductTypeCustomtypecode::TYPE_ID, $applyTo)) 
 $applyTo = XXXCustomiseProductInfoModelProductTypeCustomtypecode::TYPE_ID;
 $eavSetup->updateAttribute(
 MagentoCatalogModelProduct::ENTITY,
 $field,
 'apply_to',
 implode(',', $applyTo)
 );
 
 
 

Please try and let me know if any issue.