How to submit or Upload Multisite Sitemap?

Hello,

Thank you for contacting Rank Math support, and sorry for the unexpected delays and any inconvenience that might have been caused due to that.

Unfortunately, Rank Math doesn’t accept XML files to add an additional sitemap to your website. Rank Math generates the sitemap virtually so physical XML files aren’t supported.

If you wish to add the extra custom sitemap and other customization, please refer to this guide: https://rankmath.com/kb/filters-hooks-api-developer/#sitemap

Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.