I want to remove and switch off the XML sitemaps created through the Acabado theme.
There isn’t a setting to remove the XML sitemap generated by Acabado. That said, if you prefer to use a different plugin for the sitemap, that’s okay. You’ll just have 2. You can submit the preferred one to Google Search Console and link to it in your footer menu. Having an additional Acabado generated XML sitemap shouldn’t hurt your site in any way.