Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for the delay and for any inconvenience this issue may have caused you.
To exclude your posts/pages in your sitemap, please head over to WordPress Dashboard > Rank Math > Sitemap Settings > General.

And, here’s how you find the post/page ID inside WordPress: https://mythemeshop.com/blog/how-to-find-post-category-tag-comments-or-user-id-in-wordpress/
Please note that some options are only available when you enable the Advanced Mode in Rank Math. If it’s not showing, you must have chosen to use the Easy Mode. Please follow the steps in this link to switch to Advanced Mode:
https://rankmath.com/kb/advanced-mode/
If that didn’t help, please also share your sitemap and the URL/s of your special pages you wanted to remove in your sitemap. You can add them in the sensitive data section

It is completely secure, and only our support staff has access to that section.
I hope that helps. Thank you, and looking forward to your update.
thanks a lot. i thought it was just for posts. now i find out.
complete answer ❤
Hello,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.