Using spatie/crawler and crawl a page and retrieve all links within that page.

CategoryHelper.php

<?php

namespace App\Http\Crawler;

use Spatie\Crawler\CrawlObserver;
use GuzzleHttp\Exception\RequestException;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\UriInterface;
use Symfony\Component\DomCrawler\Crawler as DomCrawler;

class CategoryHelper extends CrawlObserver{

    public $pages =[];
    protected $selector;
    protected $url;

    public function crawled(UriInterface $url, ResponseInterface $response, UriInterface $foundOnUrl = null)
    {
        
        $this->url = $url->__toString();

        $crawler = new DomCrawler($response->getBody()->__toString());
        $crawler->filter($this->selector)->each(function (DomCrawler $node, $i) {
            // this is where you add the urls to the array
            $this->pages[] = $this->url . $node->attr('href');            
        });
    }
    
    public function crawlFailed(UriInterface $url, RequestException $requestException, UriInterface $foundOnUrl = null)
    {
        echo 'failed';
    }

    public function finishedCrawling()
    {
        // You can use this to do whatever needs to be done once the crawling has finished. 
        // What I usually do here is to remove duplicate urls
    }

    public function setSelector($selector)
    {
        $this->selector = $selector;
    }

}    

CrawlerController.php

<?php

use Spatie\Crawler\Crawler;
use App\Http\Crawler\CategoryHelper;

class CrawlerController extends Controller
{
    public $root_url;

    public function crawl($url = null)
    {
        $this->root_url = 'https://www.amazon.com/';

        $cat_helper = new CategoryHelper();
        $cat_helper->setSelector('a.a-link-normal'); // Pass the css selector that contains the links

        Crawler::create()
        ->setCrawlObserver($cat_helper)
        ->setMaximumCrawlCount(1)
        ->ignoreRobots()
        ->startCrawling($this->root_url); 
        
        $pages = $cat_helper->pages;

    }
}