A: Hey there, Sumo-ling! Thank you for your question.

The sitemap_index.xml is originally from Yoast, so it's not generated by Squirrly SEO. However, Squirrly displays the sitemap at that URL to prevent a 404 error for users who have switched from Yoast to Squirrly SEO.

Hope this clarifies the situation, but please let me know if you need more details or have any other questions.