If you need lists of websites in template file then follow below steps:

Add one block file(GetWebsiteList.php) in your existing module and paste below code:

<?php 
namespace VendernameModulenameBlock; 
class GetWebsiteList extends MagentoFrameworkViewElementTemplate 
{ 
    public function __construct( 
        MagentoFrameworkViewElementTemplateContext $context, 
        MagentoStoreModelResourceModelWebsiteCollectionFactory $websiteCollectionFactory, 
        array $data = [] ) 
    {
        $this->_websiteCollectionFactory = $websiteCollectionFactory;
        parent::__construct($context, $data);
    }

     /**
     * Retrieve websites collection of system
     *
     * @return Website Collection
     */
    public function getWebsiteLists()
    {
        $collection = $this->_websiteCollectionFactory->create();
        return $collection;
    }
}

Call in the template file,

<?php foreach($block->getWebsiteLists() as $website) {
	echo $website->getCode(); //code of website
	echo $website->getName(); //name of website
	print_r($website->getData());
}