Get sitemap urls using scrapy without scraping urls

I am building my first scrapy and am trying to retrieve the urls in the sitemap. The code works, but it seems that scrapy is also already crawling the website urls themselves. I do not want that. How do I get only the urls in the sitemap? Thanks a lot for your advice:

import scrapy
from scrapy.crawler import CrawlerProcess

class SitemapSpider(scrapy.spiders.SitemapSpider):
    name = "sitemap_spider"
    
    def __init__(self, sitemap_url, *args, **kwargs):
        super(SitemapSpider, self).__init__(*args, **kwargs)
        self.sitemap_urls = [sitemap_url]
        self.extracted_urls = []

    def parse(self, response):
        print(response.url )
        yield None

def run_sitemap_scraper(sitemap_url):
    
    # Run the scraper
    process = CrawlerProcess()
    process.crawl(SitemapSpider, sitemap_url=sitemap_url)
    process.start()

# Example usage
run_sitemap_scraper("https://ferienparkguide.de/sitemap_index.xml")

Have a look at scrapy.spiders.SitemapSpider._parse_sitemap