Should the following be blocked by sitemaps?

I’m trying to figure out if these should be blocked by my robots.txt and what impact it has?

i didn’t choose to block them I think Yoast SEO did but is it right?

http://www.holidays2crete.com/category-sitemap.xml
http://www.holidays2crete.com/destination-page-sitemap.xml
http://www.holidays2crete.com/destination-sitemap.xml

And if they shouldn’t be blocked how do I stop it please?