We are extremely sorry about that.
Can you please check the Settings at WordPress Dashboard > Rank Math > Titles & Meta > Posts.
custom and then deselect any option you do not want to have checked. Please follow this for all types of posts and pages including taxonomies. That should sort the issue.
If you could share your website URL, we would love to check which type of pages/posts are getting a noindex response.
We really look forward to helping you ASAP.
Just realized I may have made an error. This may have gone to the wrong person, but Claudio or Todd. I apologize.
Thank you for contacting Rank Math today.
No worries on the erroneous post, I have just deleted the contents of this post.
Sorry about that, it was my fault. My theme (child theme) was impacting on Rank Math Seo, it was not a plugin error.
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/?filter=5#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.