every browser sends something called UA (user agent)
depending on it, some plugins generate different sitemaps,
so they show different results depending on whether the person visited (browser)
or search bot engine (which is identified differently through UA)
Generally you don’t need to worry about sitemaps so much as long as search engines are allowed to inspect your site…they will index it at some point,
and probably follow those specified URLs in your sitemaps generated by that plugin.
But you can always visit the articles I linked here and follow them and adjust according to your wishes