Why can unpublished media be view?

Look at https://liza-frank.com/sitemap_index.xml

In your Yoast settings, disable the sitemap for attachments if any of the unpublished ones are on this list: https://liza-frank.com/attachment-sitemap.xml

Hi Steven, apologies for not replying before now. Thanks for the heads up – yes lots of unpublished images are included on the first link. Unfortunately, I’m being a bit technically challenged as the second link doesn’t work, and I’m not sure how to find it. Apologies for asking for more of you time, but what should I do next? Many thanks, Liza

I recommend asking at https://www.ads-software.com/support/plugin/wordpress-seo/#new-post so the plugin’s developers and support community can help you with this.