Hello,
Thank you for contacting Rank Math today.
Please head over to Rank Math > Titles & Meta > Categories and check the noindex option under the Category Archives Robots Meta as shown below:

You can do the same thing for the tags on the same page.
If you wish to set specific pages to noindex, you should make sure the individual page is selected as ‘noindex’ in WP > Posts > Your Post > Advanced Tab in Rank Math.

If you want to set all pages to noindex you can do so with the global settings. Ensure that the noindex is selected for Global or Posts meta. You can do so under Rank Math > Titles & Meta > Pages and under the robots meta choose noindex.
Please note that no index posts/pages are not included in the sitemap as well.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
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.