Hello,
Thank you for contacting Rank Math support and we’re sorry for any inconvenience you’ve experienced with your sitemap. We’ve looked into the sitemap you provided and it seems to be working fine now. Here’s how it looks on our end:

However, as we mentioned in your other ticket, the most likely cause of this issue is whitespace in your theme code, either in your wp-config.php
file or your theme’s functions.php
file. This can happen when you edit these files manually or use a plugin or theme that changes them. To fix this issue, you need to find and remove the whitespace from your theme code. You can follow this guide to help you with that: https://rankmath.com/kb/fix-sitemap-issues/#xml-text-declaration
We hope this helps you resolve the issue. If you need any further assistance or have any other questions, please feel free to contact us again. We’re always happy to help.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.