Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
You can set the categories and tags to noindex by going to Rank Math > Titles & Meta > Categories > Turn on Category Archives Robots Meta > Check noindex checkbox > Save

Same goes for tags, head over to Rank Math > Titles & Meta > Tags > Turn on Tag Archives Robots Meta > Check noindex checkbox > Save
I hope this helps. Looking forward to helping you.
but there are no options for set noindex and category archives robots meta. only there are two options that appear one category archive title and category archive description and no other option are in this navigation Rank Math > Titles & Meta > Categories.
please help
Hello,
Thank you for the update.
It seems that your Rank Math is still set to Easy Mode that’s why the options are not showing.
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:
https://rankmath.com/kb/advanced-mode/
I hope that helps. Thank you, and please don’t hesitate to contact us anytime if you need further assistance.